# List of United States representatives from Pennsylvania

The following is a list of members of the United States House of Representatives from the Commonwealth of Pennsylvania. For chronological tables of members of both houses of the United States Congress from the state (through the present day), see United States congressional delegations from Pennsylvania. The list has been updated periodically to reflect changes in membership; current entries are for members of the 119th Congress.

## Current members

Listed below are the incumbent members of the Pennsylvania House Delegation to the 119th Congress, updated on January 3, 2023:
* 1st district: Brian Fitzpatrick (R) (since 2017)
* 2nd district: Brendan Boyle (D) (since 2015)
* 3rd district: Dwight Evans (D) (since 2016)
* 4th district: Madeleine Dean (D) (since 2019)
* 5th district: Mary Gay Scanlon (D) (since 2018)
* 6th district: Chrissy Houlahan (D) (since 2019)
* 7th district: Ryan Mackenzie (R) (since 2025)
* 8th district: Rob Bresnahan (R) (since 2025)
* 9th district: Dan Meuser (R) (since 2019)
* 10th district: Scott Perry (R) (since 2013)
* 11th district: Lloyd Smucker (R) (since 2017)
* 12th district: Summer Lee (D) (since 2023)
* 13th district: John Joyce (R) (since 2019)
* 14th district: Guy Reschenthaler (R) (since 2019)
* 15th district: Glenn Thompson (R) (since 2009)
* 16th district: Mike Kelly (R) (since 2011)
* 17th district: Chris Deluzio (D) (since 2023)

## List of members

| Member | Party | District | Years | Electoral history |
| Ernest F. Acheson | Republican | 24th | March 4, 1895 – March 4, 1909 | Lost re-election. |
| Ephraim L. Acker | Democratic | 6th | March 4, 1871 – March 4, 1873 | Lost re-election. |
| Robert Adams Jr. | Republican | 2nd | December 19, 1893 – June 1, 1906 | Died. |
| William Addams | Jacksonian | 7th | March 4, 1825 – March 4, 1829 | Lost re-election. |
| John A. Ahl | Democratic | 16th | March 4, 1857 – March 4, 1859 | Retired. |
| William D. B. Ainey | Republican | 14th | November 7, 1911 – March 4, 1915 | Retired. |
| Charles Albright | Republican | At-large | March 4, 1873 – March 4, 1875 | Retired. |
| Robert G. Allen | Democratic | 28th | January 3, 1937 – January 3, 1941 | Retired. |
| James Allison Jr. | Democratic-Republican | 16th | March 4, 1823 – August 26, 1825 | Resigned. |
| John Allison | Whig | 20th | March 4, 1851 – March 4, 1853 | Lost re-election. |
| John Allison | Opposition | 23rd | March 4, 1855 – March 4, 1857 | Retired. |
| Robert Allison | Anti-Masonic | 12th | March 4, 1831 – March 4, 1833 | Retired. |
| Jason Altmire | Democratic | 4th | January 3, 2007 – January 3, 2013 | Redistricted and lost renomination. |
| Lemuel Amerman | Democratic | 11th | March 4, 1891 – March 4, 1893 | Lost re-election. |
| Joseph S. Ammerman | Democratic | 23rd | January 3, 1977 – January 3, 1979 | Lost re-election. |
| Sydenham E. Ancona | Democratic | 8th | March 4, 1861 – March 4, 1867 | Lost re-election. |
| Isaac Anderson | Democratic-Republican | 3rd | March 4, 1803 – March 4, 1807 | Retired. |
| Samuel Anderson | Anti-Jacksonian | 4th | March 4, 1827 – March 4, 1829 | Retired and returned to Pennsylvania House of Representatives. |
| William Anderson | Democratic-Republican | 1st | March 4, 1809 – March 4, 1815 | |
| William Anderson | Democratic-Republican | 1st | March 4, 1817 – March 4, 1819 | |
| Joseph B. Anthony | Jacksonian | 16th | March 4, 1833 – March 4, 1837 | |
| James Armstrong | Pro-Administration | At-large | March 4, 1793 – March 4, 1795 | Retired. |
| William H. Armstrong | Republican | 18th | March 4, 1869 – March 4, 1871 | Lost re-election. |
| William C. Arnold | Republican | 28th | March 4, 1895 – March 4, 1899 | Lost re-election. |
| Michael W. Ash | Jacksonian | 3rd | March 4, 1835 – March 4, 1837 | Retired. |
| Eugene Atkinson | Democratic | 25th | January 3, 1979 – October 14, 1981 | Switched parties. |
| Eugene Atkinson | Republican | 25th | October 14, 1981 – January 3, 1983 | Redistricted and lost re-election. |
| Louis E. Atkinson | Republican | 18th | March 4, 1883 – March 4, 1893 | Withdrew from re-election campaign and retired. |
| Elijah Babbitt | Republican | 25th | March 4, 1859 – March 4, 1863 | Retired. |
| Reuben K. Bachman | Democratic | 10th | March 4, 1879 – March 4, 1881 | Retired. |
| Donald A. Bailey | Democratic | 21st | January 3, 1979 – January 3, 1983 | Redistricted and lost renomination. |
| Joseph Bailey | Democratic | 16th | March 4, 1861 – March 4, 1863 | |
| Joseph Bailey | Democratic | 15th | March 4, 1863 – March 4, 1865 | |
| Warren W. Bailey | Democratic | 19th | March 4, 1913 – March 4, 1917 | |
| Henry Baldwin | Democratic-Republican | 14th | March 4, 1817 – May 8, 1822 | Resigned. |
| John Banks | Anti-Masonic | 18th | March 4, 1831 – March 4, 1833 | Resigned to become the judge of the Berks judicial district. |
| John Banks | Anti-Masonic | 24th | March 4, 1833 – March 31, 1836 | Resigned to become the judge of the Berks judicial district. |
| Laird H. Barber | Democratic | 8th | March 4, 1899 – March 4, 1901 | |
| Andrew J. Barchfeld | Republican | 32nd | March 4, 1905 – March 4, 1917 | |
| Charles F. Barclay | Republican | 21st | March 4, 1907 – March 4, 1911 | |
| David Barclay | Democratic | 24th | March 4, 1855 – March 4, 1857 | |
| David Bard | Democratic-Republican | 10th | March 4, 1795 – March 4, 1799 | |
| David Bard | Democratic-Republican | 4th | March 4, 1803 – March 4, 1813 | |
| David Bard | Democratic-Republican | 9th | March 4, 1813 – March 12, 1815 | |
| Abraham A. Barker | Republican | 17th | March 4, 1865 – March 4, 1867 | |
| Lou Barletta | Republican | 11th | January 3, 2011 – January 3, 2019 | Retired. |
| Stephen Barlow | Jacksonian | 18th | March 4, 1827 – March 4, 1829 | |
| Charles Augustus Barnitz | Anti-Masonic | 11th | March 4, 1833 – March 4, 1835 | |
| Samuel F. Barr | Republican | 14th | March 4, 1881 – March 4, 1885 | |
| William A. Barrett | Democratic | 1st | January 3, 1945 – January 3, 1947 | |
| William A. Barrett | Democratic | 1st | January 3, 1949 – April 12, 1976 | Died. |
| Arthur L. Bates | Republican | 26th | March 4, 1901 – March 4, 1903 | |
| Arthur L. Bates | Republican | 25th | March 4, 1903 – March 4, 1913 | |
| Thomas M. Bayne | Republican | 23rd | March 4, 1877 – March 4, 1891 | |
| Joseph G. Beale | Republican | 27th | March 4, 1907 – March 4, 1909 | |
| C. William Beales | Republican | 20th | March 4, 1915 – March 4, 1917 | |
| William Beatty | Democratic | 23rd | March 4, 1837 – March 4, 1841 | |
| Andrew Beaumont | Jacksonian | 15th | March 4, 1833 – March 4, 1837 | |
| James M. Beck | Republican | 1st | November 8, 1927 – March 4, 1933 | |
| James M. Beck | Republican | 2nd | March 4, 1933 – September 30, 1934 | |
| Edward M. Beers | Republican | 18th | March 4, 1923 – April 21, 1932 | Died. |
| Henry W. Beeson | Democratic | 20th | May 31, 1841 – March 4, 1843 | |
| Frank E. Beltzhoover | Democratic | 19th | March 4, 1879 – March 4, 1883 | |
| Frank E. Beltzhoover | Democratic | 19th | March 4, 1891 – March 4, 1895 | |
| George J. Benner | Democratic | 19th | March 4, 1897 – March 4, 1899 | |
| William M. Berlin | Democratic | 28th | March 4, 1933 – January 3, 1937 | |
| Earl H. Beshlin | Democratic | 28th | November 6, 1917 – March 4, 1919 | |
| Thomas M. Bibighaus | Whig | 14th | March 4, 1851 – March 4, 1853 | |
| Charles J. Biddle | Democratic | 2nd | July 2, 1861 – March 4, 1863 | |
| Joseph F. Biddle | Republican | 18th | November 8, 1932 – March 4, 1933 | |
| Richard Biddle | Anti-Masonic | 22nd | March 4, 1837 – July 21, 1840 | Resigned. |
| Benjamin A. Bidlack | Democratic | 15th | March 4, 1841 – March 4, 1843 | |
| Benjamin A. Bidlack | Democratic | 11th | March 4, 1843 – March 4, 1845 | |
| James S. Biery | Republican | 6th | March 4, 1873 – March 4, 1875 | |
| Edward G. Biester Jr. | Republican | 8th | January 3, 1967 – January 3, 1977 | |
| Alexander Billmeyer | Democratic | 17th | November 4, 1902 – March 4, 1903 | |
| Henry H. Bingham | Republican | 1st | March 4, 1879 – March 22, 1912 | Died. |
| Horace Binney | Anti-Jacksonian | 2nd | March 4, 1833 – March 4, 1835 | |
| Harris J. Bixler | Republican | 28th | March 4, 1921 – March 4, 1927 | |
| Henry Black | Whig | 18th | June 28, 1841 – November 28, 1841 | Died. |
| James Black | Jacksonian | 13th | December 5, 1836 – March 4, 1837 | |
| James Black | Democratic | 16th | March 4, 1843 – March 4, 1847 | |
| Lucien E. Blackwell | Democratic | 2nd | November 5, 1991 – January 3, 1995 | |
| Samuel S. Blair | Republican | 18th | March 4, 1859 – March 4, 1863 | |
| John Blanchard | Whig | 17th | March 4, 1845 – March 4, 1849 | |
| Andrew Boden | Democratic-Republican | 5th | March 4, 1817 – March 4, 1821 | |
| Patrick J. Boland | Democratic | 11th | March 4, 1931 – May 18, 1942 | Died. |
| Veronica G. Boland | Democratic | 11th | November 3, 1942 – January 3, 1943 | |
| Edward J. Bonin | Republican | 11th | January 3, 1953 – January 3, 1955 | |
| Robert A. Borski Jr. | Democratic | 3rd | January 3, 1983 – January 3, 2003 | |
| Thomas Boude | Federalist | 7th | March 4, 1801 – March 4, 1803 | |
| Franklin Bound | Republican | 14th | March 4, 1885 – March 4, 1889 | |
| Charles C. Bowman | Republican | 11th | March 4, 1911 – December 12, 1912 | Seat declared vacant. |
| Benjamin M. Boyer | Democratic | 6th | March 4, 1865 – March 4, 1869 | |
| Brendan F. Boyle | Democratic | 13th | January 3, 2015 – January 3, 2019 | Redistricted. |
| Brendan F. Boyle | Democratic | 2nd | January 3, 2019 – present | Incumbent |
| Charles E. Boyle | Democratic | 21st | March 4, 1883 – March 4, 1887 | |
| Henry M. Brackenridge | Whig | 22nd | October 13, 1840 – March 4, 1841 | |
| Michael J. Bradley | Democratic | 3rd | January 3, 1937 – January 3, 1947 | |
| Samuel C. Bradshaw | Opposition | 7th | March 4, 1855 – March 4, 1857 | |
| Robert A. Brady | Democratic | 1st | May 19, 1998 – January 3, 2019 | Retired. |
| Jasper E. Brady | Whig | 16th | March 4, 1847 – March 4, 1849 | |
| Samuel M. Brainerd | Republican | 27th | March 4, 1883 – March 4, 1885 | |
| Samuel Breck | Federalist | 1st | March 4, 1823 – March 4, 1825 | |
| Rob Bresnahan | Republican | 8th | January 3, 2025 – present | Incumbent |
| Samuel A. Bridges | Democratic | 6th | March 6, 1848 – March 4, 1849 | |
| Samuel A. Bridges | Democratic | 7th | March 4, 1853 – March 4, 1855 | |
| Samuel A. Bridges | Democratic | 10th | March 4, 1877 – March 4, 1879 | |
| John Brisbin | Democratic | 11th | January 13, 1851 – March 4, 1851 | |
| Andrew R. Brodbeck | Democratic | 20th | March 4, 1913 – March 4, 1915 | |
| Andrew R. Brodbeck | Democratic | 20th | March 4, 1917 – March 4, 1919 | |
| J. Davis Brodhead | Democratic | 26th | March 4, 1907 – March 4, 1909 | |
| Richard Brodhead | Democratic | 10th | March 4, 1843 – March 4, 1849 | |
| Edward S. Brooks | Republican | 20th | March 4, 1919 – March 4, 1923 | |
| J. Twing Brooks | Democratic | 30th | March 4, 1933 – January 3, 1937 | |
| Jacob Broom | Know Nothing | 4th | March 4, 1855 – March 4, 1857 | |
| John M. Broomall | Republican | 7th | March 4, 1863 – March 4, 1869 | |
| Marriott Brosius | Republican | 10th | March 4, 1889 – March 16, 1901 | Died. |
| Charles Brown | Democratic | 1st | March 4, 1841 – March 4, 1843 | |
| Charles Brown | Democratic | 3rd | March 4, 1847 – March 4, 1849 | |
| James W. Brown | Independent Republican | 32nd | March 4, 1903 – March 4, 1905 | |
| Jeremiah Brown | Whig | 4th | March 4, 1841 – March 4, 1843 | |
| Jeremiah Brown | Whig | 8th | March 4, 1843 – March 4, 1845 | |
| John Brown | Democratic-Republican | 9th | March 4, 1821 – March 4, 1823 | |
| John Brown | Democratic-Republican | 12th | March 4, 1823 – March 4, 1825 | |
| Robert Brown | Democratic-Republican | 4th | December 4, 1798 – March 4, 1803 | |
| Robert Brown | Democratic-Republican | 2nd | March 4, 1803 – March 4, 1813 | |
| Robert Brown | Democratic-Republican | 6th | March 4, 1813 – March 4, 1815 | |
| William W. Brown | Republican | 16th | March 4, 1883 – March 4, 1887 | |
| D. Emmert Brumbaugh | Republican | 23rd | November 2, 1943 – January 3, 1945 | |
| D. Emmert Brumbaugh | Republican | 22nd | January 3, 1945 – January 3, 1947 | |
| Charles N. Brumm | Greenback | 13th | March 4, 1881 – March 4, 1885 | |
| Charles N. Brumm | Republican | 13th | March 4, 1885 – March 4, 1889 | |
| Charles N. Brumm | Republican | 13th | March 4, 1895 – March 4, 1899 | |
| Charles N. Brumm | Republican | 12th | November 6, 1906 – January 4, 1909 | Resigned after being elected judge of the court of common pleas of Schuylkill County, Pennsylvania. |
| George F. Brumm | Republican | 13th | March 4, 1923 – March 4, 1927 | |
| George F. Brumm | Republican | 13th | March 4, 1929 – May 29, 1934 | Died. |
| David B. Brunner | Democratic | 9th | March 4, 1889 – March 4, 1893 | |
| Andrew Buchanan | Jacksonian | 20th | March 4, 1835 – March 4, 1837 | |
| Andrew Buchanan | Democratic | 20th | March 4, 1837 – March 4, 1839 | |
| Frank Buchanan | Democratic | 33rd | May 21, 1946 – April 27, 1951 | Died. |
| James Buchanan | Federalist | 3rd | March 4, 1821 – March 4, 1823 | |
| James Buchanan | Federalist | 4th | March 4, 1823 – March 4, 1825 | |
| James Buchanan | Jacksonian | 4th | March 4, 1825 – March 4, 1831 | |
| Vera Buchanan | Democratic | 33rd | July 24, 1951 – January 3, 1953 | Died. |
| Vera Buchanan | Democratic | 30th | January 3, 1953 – November 26, 1955 | Died. |
| John C. Bucher | Jacksonian | 6th | March 4, 1831 – March 4, 1833 | |
| Charles R. Buckalew | Democratic | 11th | March 4, 1887 – March 4, 1889 | |
| Charles R. Buckalew | Democratic | 17th | March 4, 1889 – March 4, 1891 | |
| Joseph Buffington | Whig | 24th | March 4, 1843 – March 4, 1847 | |
| Frank C. Bunnell | Republican | 13th | December 24, 1872 – March 4, 1873 | |
| Frank C. Bunnell | Republican | 15th | March 4, 1885 – March 4, 1889 | |
| George Burd | Anti-Jacksonian | 13th | March 4, 1831 – March 4, 1833 | |
| George Burd | Anti-Jacksonian | 18th | March 4, 1833 – March 4, 1835 | |
| Henry Burk | Republican | 3rd | March 4, 1901 – December 5, 1903 | Died. |
| James F. Burke | Republican | 31st | March 4, 1905 – March 4, 1915 | |
| William J. Burke | Republican | At-large | March 4, 1919 – March 4, 1923 | |
| Thomas Burnside | Democratic-Republican | 9th | October 10, 1815 – April ???, 1816 | Resigned to become President Judge of Luzerne District Courts. |
| Alvin Bush | Republican | 15th | January 3, 1951 – January 3, 1953 | |
| Alvin Bush | Republican | 17th | January 3, 1953 – November 5, 1959 | Died. |
| Robert G. Bushong | Republican | 14th | March 4, 1927 – March 4, 1929 | |
| Chester P. Butler | Whig | 11th | March 4, 1847 – October 5, 1850 | Died. |
| Thomas S. Butler | Independent Republican | 6th | March 4, 1897 – March 4, 1899 | |
| Thomas S. Butler | Republican | 6th | March 4, 1899 – March 4, 1903 | |
| Thomas S. Butler | Republican | 7th | March 4, 1903 – March 4, 1923 | |
| Thomas S. Butler | Republican | 8th | March 4, 1923 – May 26, 1928 | Died. |
| James A. Byrne | Democratic | 3rd | January 3, 1953 – January 3, 1973 | |
| John Cadwalader | Democratic | 5th | March 4, 1855 – March 4, 1857 | |
| Henry L. Cake | Republican | 10th | March 4, 1867 – March 4, 1871 | |
| Samuel Calvin | Whig | 17th | March 4, 1849 – March 4, 1851 | |
| Guy E. Campbell | Democratic | 32nd | March 4, 1917 – March 4, 1923 | |
| Guy E. Campbell | Republican | 36th | March 4, 1923 – March 4, 1933 | |
| Howard E. Campbell | Republican | 29th | January 3, 1945 – January 3, 1947 | |
| Jacob M. Campbell | Republican | 17th | March 4, 1877 – March 4, 1879 | |
| Jacob M. Campbell | Republican | 17th | March 4, 1881 – March 4, 1887 | |
| James H. Campbell | Opposition | 11th | March 4, 1855 – March 4, 1857 | |
| James H. Campbell | Republican | 11th | March 4, 1859 – March 4, 1863 | |
| John H. Campbell | Know Nothing | 3rd | March 4, 1845 – March 4, 1847 | |
| Christopher Carney | Democratic | 10th | January 3, 2007 – January 3, 2011 | Lost re-election. |
| Edmund N. Carpenter | Republican | 12th | March 4, 1925 – March 4, 1927 | |
| Wooda N. Carr | Democratic | 23rd | March 4, 1913 – March 4, 1915 | |
| Joseph L. Carrigg | Republican | 14th | November 6, 1951 – January 3, 1953 | |
| Joseph L. Carrigg | Republican | 10th | January 3, 1953 – January 3, 1959 | |
| Matt Cartwright | Democratic | 17th | January 3, 2013 – January 3, 2019 | Redistricted. |
| Matt Cartwright | Democratic | 8th | January 3, 2019 – January 3, 2025 | Lost re-election |
| John J. Casey | Democratic | 11th | March 4, 1913 – March 4, 1917 | |
| John J. Casey | Democratic | 11th | March 4, 1919 – March 4, 1921 | |
| John J. Casey | Democratic | 12th | March 4, 1923 – March 4, 1925 | |
| John J. Casey | Democratic | 12th | March 4, 1927 – May 5, 1929 | Died. |
| Joseph Casey | Whig | 13th | March 4, 1849 – March 4, 1851 | |
| Henry B. Cassel | Republican | 10th | November 5, 1901 – March 4, 1903 | |
| Henry B. Cassel | Republican | 9th | March 4, 1903 – March 4, 1909 | |
| George A. Castor | Republican | 3rd | February 16, 1904 – February 19, 1906 | Died. |
| Anthony Cavalcante | Democratic | 23rd | January 3, 1949 – January 3, 1951 | |
| John Cessna | Republican | 16th | March 4, 1869 – March 4, 1871 | |
| John Cessna | Republican | 16th | March 4, 1873 – March 4, 1875 | |
| E. Wallace Chadwick | Republican | 7th | January 3, 1947 – January 3, 1949 | |
| George Chambers | Anti-Masonic | 12th | March 4, 1833 – March 4, 1837 | |
| Joseph R. Chandler | Whig | 2nd | March 4, 1849 – March 4, 1855 | |
| Henry Chapman | Democratic | 7th | March 4, 1857 – March 4, 1859 | |
| John Chapman | Federalist | 4th | March 4, 1797 – March 4, 1799 | |
| J. Mitchell Chase | Republican | 23rd | March 4, 1927 – March 4, 1933 | |
| Earl Chudoff | Democratic | 4th | January 3, 1949 – January 5, 1958 | Resigned to become judge of the Philadelphia Court of Common Pleas. |
| Frank M. Clark | Democratic | 25th | January 3, 1955 – December 31, 1974 | |
| Henry A. Clark | Republican | 25th | March 4, 1917 – March 4, 1919 | |
| William Clark | Anti-Masonic | 10th | March 4, 1833 – March 4, 1837 | |
| Joseph Clay | Democratic-Republican | 1st | March 4, 1803 – March 28, 1808 | Resigned. |
| William F. Clinger Jr. | Republican | 23rd | January 3, 1979 – January 3, 1993 | |
| William F. Clinger Jr. | Republican | 5th | January 3, 1993 – January 3, 1997 | |
| George Clymer | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| Hiester Clymer | Democratic | 8th | March 4, 1873 – March 4, 1881 | |
| Alexander G. Cochran | Democratic | 23rd | March 4, 1875 – March 4, 1877 | |
| Thomas C. Cochran | Republican | 28th | March 4, 1927 – March 4, 1933 | |
| Thomas C. Cochran | Republican | 20th | March 4, 1933 – January 3, 1935 | |
| James H. Codding | Republican | 15th | November 5, 1895 – March 4, 1899 | |
| Robert L. Coffey | Democratic | 26th | January 3, 1949 – April 20, 1949 | Died. |
| Alexander Hamilton Coffroth | Democratic | 16th | March 4, 1863 – March 4, 1865 | |
| Alexander Hamilton Coffroth | Democratic | 16th | February 19, 1866 – July 18, 1866 | Successfully contested the election of his opponent. |
| Alexander Hamilton Coffroth | Democratic | 17th | March 4, 1879 – March 4, 1881 | |
| William H. Coleman | Republican | 30th | March 4, 1915 – March 4, 1917 | |
| Francis D. Collins | Democratic | 11th | March 4, 1875 – March 4, 1879 | |
| John Conard | Democratic-Republican | 1st | March 4, 1803 – March 4, 1815 | |
| Charles R. Connell | Republican | 10th | March 4, 1921 – September 26, 1922 | Died. |
| William Connell | Republican | 11th | March 4, 1897 – March 4, 1903 | |
| William Connell | Republican | 10th | February 10, 1904 – March 4, 1905 | |
| Daniel W. Connolly | Democratic | 12th | March 4, 1883 – March 4, 1885 | |
| James J. Connolly | Republican | 5th | March 4, 1921 – January 3, 1935 | |
| William S. Conover | Republican | 27th | April 25, 1972 – January 3, 1973 | |
| Frederick Conrad | Democratic-Republican | 2nd | March 4, 1803 – March 4, 1807 | |
| Joel Cook | Republican | 2nd | November 5, 1907 – December 15, 1910 | Died. |
| Allen F. Cooper | Republican | 23rd | March 4, 1903 – March 4, 1911 | |
| James Cooper | Whig | 12th | March 4, 1839 – March 4, 1843 | |
| Thomas B. Cooper | Democratic | 7th | March 4, 1861 – April 4, 1862 | |
| Robert J. Corbett | Republican | 30th | January 3, 1939 – January 3, 1941 | |
| Robert J. Corbett | Republican | 30th | January 3, 1945 – January 3, 1953 | |
| Robert J. Corbett | Republican | 29th | January 3, 1953 – January 3, 1963 | |
| Peter E. Costello | Republican | 5th | March 4, 1915 – March 4, 1921 | |
| Ryan Costello | Republican | 6th | January 3, 2015 – January 3, 2019 | Retired. |
| Clarence D. Coughlin | Republican | 11th | March 4, 1921 – March 4, 1923 | |
| R. Lawrence Coughlin | Republican | 13th | January 3, 1969 – January 3, 1993 | |
| Richard Coulter | Jacksonian | 17th | March 4, 1827 – March 4, 1833 | |
| Richard Coulter | Jacksonian | 19th | March 4, 1833 – March 4, 1835 | |
| John Covode | Opposition | 19th | March 4, 1855 – March 4, 1857 | |
| John Covode | Republican | 19th | March 4, 1857 – March 4, 1863 | |
| John Covode | Republican | 21st | March 4, 1867 – March 4, 1869 | |
| John Covode | Republican | 21st | February 9, 1870 – January 11, 1871 | Died. |
| William R. Coyle | Republican | 30th | March 4, 1925 – March 4, 1927 | |
| William R. Coyle | Republican | 30th | March 4, 1929 – March 4, 1933 | |
| James K. Coyne III | Republican | 8th | January 3, 1981 – January 3, 1983 | |
| William J. Coyne | Democratic | 14th | January 3, 1981 – January 3, 2003 | Retired. |
| Thomas S. Crago | Republican | 23rd | March 4, 1911 – March 4, 1913 | |
| Thomas S. Crago | Republican | At-large | March 4, 1915 – March 4, 1921 | |
| Thomas S. Crago | Republican | At-large | September 20, 1921 – March 4, 1923 | |
| Alexander K. Craig | Democratic | 24th | February 26, 1892 – July 29, 1892 | Died. |
| Samuel A. Craig | Republican | 21st | March 4, 1889 – March 4, 1891 | |
| Nathaniel N. Craley Jr. | Democratic | 19th | January 3, 1965 – January 3, 1967 | |
| Thomas Hartley Crawford | Jacksonian | 11th | March 4, 1829 – March 4, 1833 | |
| William Crawford | Democratic-Republican | 6th | March 4, 1809 – March 4, 1813 | |
| William Crawford | Democratic-Republican | 5th | March 4, 1813 – March 4, 1817 | |
| John V. Creely | Republican | 2nd | March 4, 1871 – March 4, 1873 | |
| Mark Critz | Democratic | 12th | May 18, 2010 – January 3, 2013 | Lost re-election. |
| William M. Croll | Democratic | 14th | March 4, 1923 – March 4, 1925 | |
| Charles N. Crosby | Democratic | 29th | March 4, 1933 – January 3, 1939 | |
| Edward Crouch | Democratic-Republican | 3rd | October 12, 1813 – March 4, 1815 | |
| William J. Crow | Republican | 23rd | January 3, 1947 – January 3, 1949 | |
| William C. Culbertson | Republican | 26th | March 4, 1889 – March 4, 1891 | |
| Charles V. Culver | Republican | 20th | March 4, 1865 – March 4, 1867 | |
| Herbert W. Cummings | Democratic | 17th | March 4, 1923 – March 4, 1925 | |
| Andrew G. Curtin | Democratic | 20th | March 4, 1881 – March 4, 1887 | |
| Willard S. Curtin | Republican | 8th | January 3, 1957 – January 3, 1967 | |
| Carlton B. Curtis | Democratic | 23rd | March 4, 1851 – March 4, 1853 | |
| Carlton B. Curtis | Democratic | 24th | March 4, 1853 – March 4, 1855 | |
| Carlton B. Curtis | Republican | 19th | March 4, 1873 – March 4, 1875 | |
| Paul B. Dague | Republican | 9th | January 3, 1947 – December 30, 1966 | Resigned. |
| Kathy Dahlkemper | Democratic | 3rd | January 3, 2009 – January 3, 2011 | Lost re-election. |
| Thomas H. Dale | Republican | 10th | March 4, 1905 – March 4, 1907 | |
| J. Burrwood Daly | Democratic | 4th | January 3, 1935 – March 12, 1939 | Died. |
| John Dalzell | Republican | 22nd | March 4, 1887 – March 4, 1903 | |
| John Dalzell | Republican | 30th | March 4, 1903 – March 4, 1913 | |
| Joel B. Danner | Democratic | 15th | December 2, 1850 – March 4, 1851 | |
| Edward Darlington | Anti-Masonic | 4th | March 4, 1833 – March 4, 1839 | |
| Isaac Darlington | Federalist | 2nd | March 4, 1817 – March 4, 1819 | |
| Smedley Darlington | Republican | 6th | March 4, 1887 – March 4, 1891 | |
| William Darlington | Democratic-Republican | 2nd | March 4, 1815 – March 4, 1817 | |
| William Darlington | Democratic-Republican | 2nd | March 4, 1819 – March 4, 1823 | |
| Cornelius Darragh | Whig | 21st | March 26, 1844 – March 4, 1847 | |
| George P. Darrow | Republican | 6th | March 4, 1915 – March 4, 1923 | |
| George P. Darrow | Republican | 7th | March 4, 1923 – January 3, 1937 | |
| George P. Darrow | Republican | 7th | January 3, 1939 – January 3, 1941 | |
| Harry J. Davenport | Democratic | 29th | January 3, 1949 – January 3, 1951 | |
| Samuel A. Davenport | Republican | At-large | March 4, 1897 – March 4, 1901 | |
| Stanley W. Davenport | Democratic | 12th | March 4, 1899 – March 4, 1901 | |
| Edward Davies | Anti-Masonic | 4th | March 4, 1837 – March 4, 1841 | |
| John Davis | Democratic | 6th | March 4, 1839 – March 4, 1841 | |
| Robert L. Davis | Republican | 6th | November 8, 1932 – March 4, 1933 | |
| Roger Davis | Democratic-Republican | 2nd | March 4, 1811 – March 4, 1813 | |
| Roger Davis | Democratic-Republican | 3rd | March 4, 1813 – March 4, 1815 | |
| William M. Davis | Republican | 5th | March 4, 1861 – March 4, 1863 | |
| John L. Dawson | Democratic | 18th | March 4, 1851 – March 4, 1853 | |
| John L. Dawson | Democratic | 20th | March 4, 1853 – March 4, 1855 | |
| John L. Dawson | Democratic | 21st | March 4, 1863 – March 4, 1867 | |
| Madeleine Dean | Democratic | 4th | January 3, 2019 – present | Incumbent |
| Peter J. De Muth | Democratic | 30th | January 3, 1937 – January 3, 1939 | |
| Elias Deemer | Republican | 16th | March 4, 1901 – March 4, 1903 | |
| Elias Deemer | Republican | 15th | March 4, 1903 – March 4, 1907 | |
| Chris Deluzio | Democratic | 17th | January 3, 2023 – present | Incumbent |
| Charles Denison | Democratic | 12th | March 4, 1863 – June 27, 1867 | Died. |
| George Denison | Democratic-Republican | 10th | March 4, 1819 – March 4, 1823 | |
| Harmar Denny | Anti-Masonic | 16th | December 15, 1829 – March 4, 1833 | |
| Harmar Denny | Anti-Masonic | 22nd | March 4, 1833 – March 4, 1837 | |
| Harmar D. Denny Jr. | Republican | 29th | January 3, 1951 – January 3, 1953 | |
| Charlie Dent | Republican | 15th | January 3, 2005 – May 12, 2018 | Resigned. |
| John H. Dent | Democratic | 21st | January 21, 1958 – January 3, 1979 | |
| Franklin L. Dershem | Democratic | 17th | March 4, 1913 – March 4, 1915 | |
| Arthur G. Dewalt | Democratic | 13th | March 4, 1915 – March 4, 1921 | |
| Lewis Dewart | Jacksonian | 9th | March 4, 1831 – March 4, 1833 | |
| William L. Dewart | Democratic | 11th | March 4, 1857 – March 4, 1859 | |
| John Dick | Whig | 25th | March 4, 1853 – March 4, 1855 | |
| John Dick | Opposition | 25th | March 4, 1855 – March 4, 1857 | |
| John Dick | Republican | 25th | March 4, 1857 – March 4, 1859 | |
| Samuel B. Dick | Republican | 26th | March 4, 1879 – March 4, 1881 | |
| Charles H. Dickerman | Democratic | 16th | March 4, 1903 – March 4, 1905 | |
| Jesse C. Dickey | Whig | 7th | March 4, 1849 – March 4, 1851 | |
| John Dickey | Whig | 20th | March 4, 1843 – March 4, 1845 | |
| John Dickey | Whig | 20th | March 4, 1847 – March 4, 1849 | |
| Oliver J. Dickey | Republican | 9th | December 7, 1868 – March 4, 1873 | |
| Charles E. Dietrich | Democratic | 15th | January 3, 1935 – January 3, 1937 | |
| Robert E. Difenderfer | Democratic | 8th | March 4, 1911 – March 4, 1915 | |
| Milo M. Dimmick | Democratic | 10th | March 4, 1849 – March 4, 1853 | |
| William H. Dimmick | Democratic | 13th | March 4, 1857 – March 4, 1861 | |
| Davis Dimock Jr. | Democratic | 17th | March 4, 1841 – January 13, 1842 | Died. |
| J. William Ditter | Republican | 17th | March 4, 1933 – November 21, 1943 | Died. |
| Joseph B. Donley | Republican | 24th | March 4, 1869 – March 4, 1871 | |
| Michael Donohoe | Democratic | 5th | March 4, 1911 – March 4, 1915 | |
| Frank J. G. Dorsey | Democratic | 5th | January 3, 1935 – January 3, 1939 | |
| Charles F. Dougherty | Republican | 4th | January 3, 1979 – January 3, 1983 | |
| Isaac H. Doutrich | Democratic | 19th | March 4, 1927 – January 3, 1937 | |
| Michael F. Doyle | Democratic | 18th | January 3, 1995 – January 3, 2003 | Redistricted. |
| Michael F. Doyle | Democratic | 14th | January 3, 2003 – January 3, 2019 | Redistricted. |
| Michael F. Doyle | Democratic | 18th | January 3, 2019 – December 31, 2022 | Retired and resigned early. |
| Solomon R. Dresser | Republican | 21st | March 4, 1903 – March 4, 1907 | |
| Ira W. Drew | Democratic | 7th | January 3, 1937 – January 3, 1939 | |
| Denis J. Driscoll | Democratic | 20th | January 3, 1935 – January 3, 1937 | |
| Augustus Drum | Democratic | 19th | March 4, 1853 – March 4, 1855 | |
| William A. Duncan | Democratic | 19th | March 4, 1883 – November 14, 1884 | Died. |
| Matthew A. Dunn | Democratic | 34th | March 4, 1933 – January 3, 1941 | |
| Herman P. Eberharter | Democratic | 32nd | January 3, 1937 – January 3, 1943 | Died. |
| Herman P. Eberharter | Democratic | 31st | January 3, 1943 – January 3, 1945 | Died. |
| Herman P. Eberharter | Democratic | 32nd | January 3, 1945 – January 3, 1953 | Died. |
| Herman P. Eberharter | Democratic | 28th | January 3, 1953 – September 9, 1958 | Died. |
| Charles R. Eckert | Democratic | 26th | January 3, 1935 – January 3, 1939 | |
| George N. Eckert | Whig | 14th | March 4, 1847 – March 4, 1849 | |
| Robert W. Edgar | Democratic | 7th | January 3, 1975 – January 3, 1987 | |
| John R Edie | Opposition | 18th | March 4, 1855 – March 4, 1857 | |
| John R Edie | Republican | 18th | March 4, 1857 – March 4, 1859 | |
| George W. Edmonds | Republican | 4th | March 4, 1913 – March 4, 1925 | |
| George W. Edmonds | Republican | 4th | March 4, 1933 – January 3, 1935 | |
| John Edwards | Anti-Masonic | 4th | March 4, 1839 – March 4, 1841 | |
| John Edwards | Whig | 4th | March 4, 1841 – March 4, 1843 | |
| Samuel Edwards | Federalist | 1st | March 4, 1819 – March 4, 1823 | |
| Samuel Edwards | Federalist | 4th | March 4, 1823 – March 4, 1825 | |
| Samuel Edwards | Jacksonian | 4th | March 4, 1825 – March 4, 1827 | |
| Albert G. Egbert | Democratic | 27th | March 4, 1875 – March 4, 1877 | |
| George Ege | Federalist | 5th | December 8, 1796 – October ???, 1797 | Resigned. |
| Joshua Eilberg | Democratic | 4th | January 3, 1967 – January 3, 1979 | |
| Henry Ellenbogen | Democratic | 33rd | March 4, 1933 – January 3, 1938 | Resigned to become a judge of common pleas for Allegheny County, PA |
| Douglas H. Elliott | Republican | 18th | April 26, 1960 – June 19, 1960 | Died. |
| Mortimer F. Elliott | Democratic | At-large | March 4, 1883 – March 4, 1885 | |
| William Cox Ellis | Federalist | 9th | March 4, 1823 – March 4, 1825 | |
| Phil English | Republican | 21st | January 3, 1995 – January 3, 2003 | |
| Phil English | Republican | 3rd | January 3, 2003 – January 3, 2009 | |
| Constantine J. Erdman | Democratic | 9th | March 4, 1893 – March 4, 1897 | |
| Jacob Erdman | Democratic | 6th | March 4, 1845 – March 4, 1847 | |
| Edmund F. Erk | Republican | 32nd | November 4, 1930 – March 4, 1933 | |
| Daniel Ermentrout | Democratic | 8th | March 4, 1881 – March 4, 1889 | |
| Daniel Ermentrout | Democratic | 9th | March 4, 1897 – September 17, 1899 | Died. |
| Russell Errett | Republican | 22nd | March 4, 1877 – March 4, 1883 | |
| Allen E. Ertel | Democratic | 17th | January 3, 1977 – January 3, 1983 | |
| Edwin D. Eshleman | Republican | 16th | January 3, 1967 – January 3, 1977 | |
| Harry A. Estep | Republican | 35th | March 4, 1927 – March 4, 1933 | |
| Charles J Esterly | Republican | 14th | March 4, 1925 – March 4, 1927 | |
| Charles J Esterly | Republican | 14th | March 4, 1929 – March 4, 1931 | |
| Alvin Evans | Republican | 20th | March 4, 1901 – March 4, 1903 | |
| Alvin Evans | Republican | 19th | March 4, 1903 – March 4, 1905 | |
| Dwight Evans | Democratic | 2nd | November 8, 2016 – January 3, 2019 | Redistricted. |
| Dwight Evans | Democratic | 3rd | January 3, 2019 – present | Incumbent |
| Isaac N Evans | Republican | 7th | March 4, 1877 – March 4, 1879 | |
| Isaac N Evans | Republican | 7th | March 4, 1883 – March 4, 1887 | |
| Joshua Evans Jr. | Jacksonian | 4th | March 4, 1829 – March 4, 1833 | |
| James B. Everhart | Republican | 6th | March 4, 1883 – March 4, 1887 | |
| William Everhart | Whig | 6th | March 4, 1853 – March 4, 1855 | |
| John H. Ewing | Whig | 20th | March 4, 1845 – March 4, 1847 | |
| Charles I. Faddis | Democratic | 25th | March 4, 1933 – December 4, 1942 | Resigned to join the US Army. |
| John R. Farr | Republican | 10th | March 4, 1911 – March 4, 1919 | |
| John R. Farr | Republican | 10th | February 25, 1921 – March 4, 1921 | Successfully contested the election of Patrick McLane. |
| John W. Farrelly | Whig | 22nd | March 4, 1847 – March 4, 1849 | |
| Patrick Farrelly | Democratic-Republican | 15th | March 4, 1821 – March 4, 1823 | Died. |
| Patrick Farrelly | Democratic-Republican | 18th | March 4, 1823 – March 4, 1825 | Died. |
| Patrick Farrelly | Jacksonian | 18th | March 4, 1825 – January 12, 1826 | Died. |
| Chaka Fattah | Democratic | 2nd | January 3, 1995 – June 23, 2016 | Resigned due to conviction of corruption charges. |
| Clare G. Fenerty | Republican | 3rd | January 3, 1935 – January 3, 1937 | |
| Ivor D. Fenton | Republican | 13th | January 3, 1939 – January 3, 1945 | |
| Ivor D. Fenton | Republican | 12th | January 3, 1945 – January 3, 1963 | |
| John Findlay | Democratic-Republican | 5th | October 9, 1821 – March 4, 1823 | |
| John Findlay | Democratic-Republican | 11th | March 4, 1823 – March 4, 1825 | |
| John Findlay | Jacksonian | 11th | March 4, 1825 – March 4, 1827 | |
| William Findley | Anti-Administration | 8th | March 4, 1791 – March 4, 1793 | |
| William Findley | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| William Findley | Democratic-Republican | 11th | March 4, 1795 – March 4, 1799 | |
| William Findley | Democratic-Republican | 8th | March 4, 1803 – March 4, 1813 | |
| William Findley | Democratic-Republican | 11th | March 4, 1813 – March 4, 1817 | |
| Darwin A. Finney | Republican | 20th | March 4, 1867 – August 25, 1868 | Died. |
| Horatio G. Fisher | Republican | 18th | March 4, 1879 – March 4, 1883 | |
| Brian Fitzpatrick | Republican | 8th | January 3, 2017 – January 3, 2019 | Redistricted. |
| Brian Fitzpatrick | Republican | 1st | January 3, 2019 – present | Incumbent |
| Mike Fitzpatrick | Republican | 8th | January 3, 2005 – January 3, 2007 | Lost re-election. |
| Mike Fitzpatrick | Republican | 8th | January 3, 2011 – January 3, 2017 | Retired. |
| Thomas Fitzsimons | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | Redistricted. |
| Thomas Fitzsimons | Pro-Administration | 1st | March 4, 1791 – March 3, 1793 | Redistricted. |
| Thomas Fitzsimons | Pro-Administration | At-large | March 4, 1793 – March 4, 1795 | Lost re-election. |
| J. Harold Flannery | Democratic | 12th | January 3, 1937 – January 3, 1942 | Resigned to become judge of common pleas of Luzerne County, Pennsylvania. |
| George W. Fleeger | Republican | 26th | March 4, 1885 – March 4, 1887 | |
| Daniel Flood | Democratic | 11th | January 3, 1945 – January 3, 1947 | |
| Daniel Flood | Democratic | 11th | January 3, 1949 – January 3, 1953 | |
| Daniel Flood | Democratic | 11th | January 3, 1955 – January 31, 1980 | Resigned due to allegations of bribery. |
| Thomas B. Florence | Democratic | 1st | March 4, 1851 – March 4, 1861 | |
| Benjamin K. Focht | Republican | 17th | March 4, 1907 – March 4, 1913 | |
| Benjamin K. Focht | Republican | 17th | March 4, 1915 – March 4, 1923 | |
| Benjamin K. Focht | Republican | 18th | March 4, 1933 – March 27, 1937 | |
| Robert H. Foerderer | Republican | At-large | March 4, 1901 – March 4, 1903 | Died. |
| Robert H. Foerderer | Republican | 4th | March 4, 1903 – July 26, 1903 | Died. |
| Thomas M. Foglietta | Democratic | 1st | January 3, 1981 – November 11, 1997 | Resigned to become Ambassador to Italy. |
| James Ford | Jacksonian | 9th | March 4, 1829 – March 4, 1833 | |
| Joseph Fornance | Democratic | 5th | March 4, 1839 – March 4, 1843 | |
| Thomas Forrest | Federalist | 1st | March 4, 1819 – March 4, 1821 | |
| Thomas Forrest | Federalist | 1st | October 8, 1822 – March 4, 1823 | |
| Chauncey Forward | Jacksonian | 13th | December 4, 1826 – March 4, 1831 | |
| Walter Forward | Democratic-Republican | 14th | October 8, 1822 – March 4, 1823 | |
| Walter Forward | Democratic-Republican | 16th | March 4, 1823 – March 4, 1825 | |
| Henry D Foster | Democratic | 19th | March 4, 1843 – March 4, 1847 | |
| Henry D Foster | Democratic | 21st | March 4, 1871 – March 4, 1873 | |
| William W. Foulkrod | Republican | 5th | March 4, 1907 – November 13, 1910 | Died. |
| Jon D. Fox | Republican | 13th | January 3, 1995 – January 3, 1999 | |
| John Freedley | Whig | 5th | March 4, 1847 – March 4, 1851 | |
| Chapman Freeman | Republican | 1st | March 4, 1875 – March 4, 1879 | |
| Oliver W. Frey | Democratic | 9th | November 7, 1933 – January 3, 1939 | |
| Henry Frick | Whig | 13th | March 4, 1843 – March 1, 1844 | Died. |
| Jacob Fry Jr. | Jacksonian | 5th | March 4, 1835 – March 4, 1837 | |
| Jacob Fry Jr. | Democratic | 5th | March 4, 1837 – March 4, 1839 | |
| Joseph Fry Jr. | Jacksonian | 7th | March 4, 1827 – March 4, 1831 | |
| George Fuller | Democratic | 12th | December 2, 1844 – March 4, 1845 | |
| Henry M Fuller | Whig | 11th | March 4, 1851 – March 4, 1853 | |
| Henry M Fuller | Opposition | 12th | March 4, 1855 – March 4, 1857 | |
| David Fullerton | Democratic-Republican | 5th | March 4, 1819 – May 15, 1820 | Resigned. |
| James G. Fulton | Republican | 31st | January 3, 1945 – January 3, 1953 | Died. |
| James G. Fulton | Republican | 27th | January 3, 1953 – October 6, 1971 | Died. |
| Grant Furlong | Democratic | 25th | January 3, 1943 – January 3, 1945 | |
| John Galbraith | Jacksonian | 25th | March 4, 1833 – March 4, 1837 | |
| John Galbraith | Democratic | 25th | March 4, 1839 – March 4, 1841 | |
| James A. Gallagher | Republican | 1st | January 3, 1943 – January 3, 1945 | |
| James A. Gallagher | Republican | 1st | January 3, 1947 – January 3, 1949 | |
| Albert Gallatin | Democratic-Republican | 12th | March 4, 1795 – March 4, 1801 | |
| James Gamble | Democratic | 13th | March 4, 1851 – March 4, 1853 | |
| James Gamble | Democratic | 15th | March 4, 1853 – March 4, 1855 | |
| Mahlon M. Garland | Republican | At-large | March 4, 1915 – November 19, 1920 | Died. |
| Alfred B. Garner | Republican | 12th | March 4, 1909 – March 4, 1911 | |
| Fred C. Gartner | Republican | 5th | March 4, 1939 – March 4, 1941 | |
| William S. Garvin | Democratic | 22nd | March 4, 1845 – March 4, 1847 | |
| Athelston Gaston | Democratic | 26th | March 4, 1899 – March 4, 1901 | |
| Leon H. Gavin | Republican | 20th | January 3, 1943 – January 3, 1945 | |
| Leon H. Gavin | Republican | 19th | January 3, 1945 – January 3, 1953 | |
| Leon H. Gavin | Republican | 23rd | January 3, 1953 – September 15, 1963 | |
| Joseph M. Gaydos | Democratic | 20th | November 5, 1968 – January 3, 1993 | |
| George Gekas | Republican | 17th | January 3, 1983 – January 3, 2003 | |
| Charles L. Gerlach | Republican | 9th | January 3, 1939 – January 3, 1945 | |
| Charles L. Gerlach | Republican | 8th | January 3, 1945 – May 5, 1947 | |
| Jim Gerlach | Republican | 6th | January 3, 2003 – January 3, 2015 | |
| Fred B. Gernerd | Republican | 13th | March 4, 1921 – March 4, 1923 | |
| James Gerry | Democratic | 11th | March 4, 1839 – March 4, 1843 | |
| James L. Getz | Democratic | 8th | March 4, 1867 – March 4, 1873 | |
| James H. Gildea | Democratic | 13th | January 3, 1935 – January 3, 1939 | |
| Calvin W. Gilfillan | Republican | 20th | March 4, 1869 – March 4, 1871 | |
| Eugene P. Gillespie | Democratic | 25th | March 4, 1891 – March 4, 1893 | |
| Wilson D. Gillette | Republican | 15th | November 4, 1941 – January 3, 1945 | Died. |
| Wilson D. Gillette | Republican | 14th | January 3, 1945 – August 7, 1951 | Died. |
| James L. Gillis | Democratic | 24th | March 4, 1857 – March 4, 1859 | |
| Alfred Gilmore | Democratic | 24th | March 4, 1849 – March 4, 1853 | |
| John Gilmore | Jacksonian | 16th | March 4, 1829 – March 4, 1833 | |
| Don H. Gingery | Democratic | 23rd | January 3, 1935 – January 3, 1939 | |
| Hugh Glasgow | Democratic-Republican | 4th | March 4, 1813 – March 4, 1817 | |
| Samuel F. Glatfelter | Democratic | 22nd | March 4, 1923 – March 4, 1925 | |
| John Gloninger | Federalist | 3rd | March 4, 1813 – August 2, 1813 | Resigned after being appointed associate judge of Lebanon County. |
| Adam J. Glossbrenner | Democratic | 15th | March 4, 1865 – March 4, 1869 | |
| William Godshalk | Republican | 7th | March 4, 1879 – March 4, 1883 | |
| Benjamin M. Golder | Republican | 4th | March 4, 1925 – March 4, 1933 | |
| George A Goodling | Republican | 19th | January 3, 1961 – January 3, 1965 | |
| George A Goodling | Republican | 19th | January 3, 1967 – January 3, 1975 | |
| William F. Goodling | Republican | 19th | January 3, 1975 – January 3, 2001 | |
| George S. Graham | Republican | 2nd | March 4, 1913 – July 4, 1931 | Died. |
| Louis E. Graham | Republican | 26th | January 3, 1939 – January 3, 1945 | |
| Louis E. Graham | Republican | 25th | January 3, 1945 – January 3, 1955 | |
| William H. Graham | Republican | 23rd | November 29, 1898 – March 4, 1903 | |
| William H. Graham | Republican | 29th | March 4, 1905 – March 4, 1911 | |
| Kathryn E. Granahan | Democratic | 2nd | November 6, 1956 – January 3, 1963 | |
| William T. Granahan | Democratic | 2nd | January 3, 1945 – January 3, 1947 | |
| William T. Granahan | Democratic | 2nd | January 3, 1949 – May 25, 1956 | Died. |
| Joseph A. Gray | Democratic | 27th | January 3, 1935 – January 3, 1939 | |
| William H. Gray | Democratic | 2nd | January 3, 1979 – September 11, 1991 | Resigned. |
| Henry D. Green | Democratic | 9th | November 7, 1899 – March 4, 1903 | |
| Innis Green | Jacksonian | 6th | March 4, 1827 – March 4, 1831 | |
| William J. Green, Jr. | Democratic | 5th | January 3, 1945 – January 3, 1947 | |
| William J. Green, Jr. | Democratic | 5th | January 3, 1949 – December 21, 1963 | Died. |
| William J. Green III | Democratic | 5th | April 28, 1964 – January 3, 1973 | |
| William J. Green III | Democratic | 3rd | January 3, 1973 – January 3, 1977 | |
| James C. Greenwood | Republican | 8th | January 3, 1993 – January 3, 2005 | |
| Andrew Gregg | Anti-Administration | 6th | March 4, 1791 – March 4, 1793 | |
| Andrew Gregg | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| Andrew Gregg | Democratic-Republican | 9th | March 4, 1795 – March 4, 1803 | |
| Andrew Gregg | Democratic-Republican | 5th | March 4, 1803 – March 4, 1807 | |
| Curtis H. Gregg | Democratic | 22nd | March 4, 1911 – March 4, 1913 | |
| William W Griest | Republican | 9th | March 4, 1909 – March 4, 1923 | Died. |
| William W Griest | Republican | 10th | March 4, 1923 – December 5, 1929 | Died. |
| Isaac Griffin | Democratic-Republican | 13th | May 13, 1813 – March 4, 1817 | |
| Samuel Griffith | Democratic | 20th | March 4, 1871 – March 4, 1873 | |
| Matthew Griswold | Republican | 26th | March 4, 1891 – March 4, 1893 | |
| Matthew Griswold | Republican | 26th | March 4, 1895 – March 4, 1897 | |
| Chester H. Gross | Republican | 22nd | January 3, 1939 – January 3, 1941 | |
| Chester H. Gross | Republican | 22nd | January 3, 1943 – January 3, 1945 | |
| Chester H. Gross | Republican | 21st | January 3, 1945 – January 3, 1949 | |
| Samuel Gross | Democratic-Republican | 2nd | March 4, 1819 – March 4, 1823 | |
| Galusha A. Grow | Democratic | 12th | March 4, 1851 – March 4, 1853 | |
| Galusha A. Grow | Democratic | 14th | March 4, 1853 – March 4, 1857 | |
| Galusha A. Grow | Republican | 14th | March 4, 1857 – March 4, 1863 | |
| Galusha A. Grow | Republican | At-large | February 26, 1894 – March 4, 1903 | |
| Amos Gustine | Democratic | 13th | March 4, 1841 – March 4, 1843 | |
| John Hahn | Democratic-Republican | 2nd | March 4, 1815 – March 4, 1817 | |
| Harry L. Haines | Democratic | 22nd | March 4, 1931 – January 3, 1939 | |
| Harry L. Haines | Democratic | 22nd | January 3, 1941 – January 3, 1943 | |
| Richard J. Haldeman | Democratic | 15th | March 4, 1869 – March 4, 1873 | |
| James T. Hale | Republican | 15th | March 4, 1859 – March 4, 1863 | |
| James T. Hale | Independent Republican | 18th | March 4, 1863 – March 4, 1865 | |
| Chapin Hall | Republican | 24th | March 4, 1859 – March 4, 1861 | |
| James K. P. Hall | Democratic | 28th | March 4, 1899 – November 29, 1902 | Resigned after being elected to the Pennsylvania State Senate. |
| Norman Hall | Democratic | 26th | March 4, 1887 – March 4, 1889 | |
| Edwin Hallowell | Democratic | 7th | March 4, 1891 – March 4, 1893 | |
| Frederick Halterman | Republican | 3rd | March 4, 1895 – March 4, 1897 | |
| John Hamilton | Democratic-Republican | 10th | March 4, 1805 – March 4, 1807 | |
| Robert H. Hammond | Democratic | 16th | March 4, 1837 – March 4, 1841 | |
| Moses Hampton | Whig | 21st | March 4, 1847 – March 4, 1851 | |
| John A. Hanna | Democratic-Republican | 6th | March 4, 1797 – March 4, 1803 | Died. |
| John A. Hanna | Democratic-Republican | 4th | March 4, 1803 – July 23, 1805 | Died. |
| Alfred C. Harmer | Republican | 5th | March 4, 1871 – March 4, 1875 | |
| Alfred C. Harmer | Republican | 5th | March 4, 1877 – March 6, 1900 | Died. |
| James Harper | Anti-Jacksonian | 2nd | March 4, 1833 – March 4, 1837 | |
| Robert Harris | Democratic-Republican | 6th | March 4, 1823 – March 4, 1825 | |
| Robert Harris | Jacksonian | 6th | March 4, 1825 – March 4, 1827 | |
| Frank G. Harrison | Democratic | 11th | January 3, 1983 – January 3, 1985 | |
| Samuel S. Harrison | Jacksonian | 23rd | March 4, 1833 – March 4, 1837 | |
| Joseph J. Hart | Democratic | 8th | March 4, 1895 – March 4, 1897 | |
| Melissa Hart | Republican | 4th | January 3, 2001 – January 3, 2007 | |
| Thomas Hartley | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | Died. |
| Thomas Hartley | Pro-Administration | 7th | March 4, 1791 – March 4, 1793 | Died. |
| Thomas Hartley | Pro-Administration | At-large | March 4, 1793 – March 4, 1795 | Died. |
| Thomas Hartley | Federalist | 8th | March 4, 1795 – December 21, 1800 | Died. |
| Jesse L. Hartman | Republican | 19th | March 4, 1911 – March 4, 1913 | |
| Samuel Hays | Democratic | 22nd | March 4, 1843 – March 4, 1845 | |
| James M. Hazlett | Republican | 1st | March 4, 1927 – October 20, 1927 | Resigned. |
| Robert D. Heaton | Republican | 12th | March 4, 1915 – March 4, 1919 | |
| Daniel B Heiner | Republican | 21st | March 4, 1893 – March 4, 1897 | |
| H. John Heinz III | Republican | 18th | November 2, 1971 – January 3, 1977 | |
| Joseph Hemphill | Federalist | 3rd | March 4, 1801 – March 4, 1803 | |
| Joseph Hemphill | Federalist | 1st | March 4, 1819 – March 4, 1823 | Resigned. |
| Joseph Hemphill | Federalist | 2nd | March 4, 1823 – 1826 | Resigned. |
| Joseph Hemphill | Jacksonian | 2nd | March 4, 1829 – March 4, 1831 | |
| Joseph Henderson | Jacksonian | 14th | March 4, 1833 – March 4, 1837 | |
| Samuel Henderson | Federalist | 2nd | October 11, 1814 – March 4, 1815 | |
| Thomas Henry | Anti-Masonic | 24th | March 4, 1837 – March 4, 1841 | |
| Thomas Henry | Whig | 24th | March 4, 1841 – March 4, 1843 | |
| Jacob Hibshman | Democratic-Republican | 3rd | March 4, 1819 – March 4, 1821 | |
| John Hickman | Democratic | 6th | March 4, 1855 – March 4, 1859 | |
| John Hickman | Anti-Lecompton Democratic | 6th | March 4, 1859 – March 4, 1861 | |
| John Hickman | Republican | 6th | March 4, 1861 – March 4, 1863 | |
| Josiah D. Hicks | Republican | 20th | March 4, 1893 – March 4, 1899 | |
| John A. Hiestand | Republican | 9th | March 4, 1885 – March 4, 1889 | |
| Daniel Hiester | Anti-Administration | At-large | March 4, 1789 – March 4, 1791 | Resigned. |
| Daniel Hiester | Anti-Administration | 4th | March 4, 1791 – March 4, 1793 | Resigned. |
| Daniel Hiester | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | Resigned. |
| Daniel Hiester | Democratic-Republican | 5th | March 4, 1795 – July 1, 1796 | Resigned. |
| Daniel Hiester | Democratic-Republican | 3rd | March 4, 1809 – March 4, 1811 | |
| Isaac E. Hiester | Whig | 9th | March 4, 1853 – March 4, 1855 | |
| John Hiester | Democratic-Republican | 3rd | March 4, 1807 – March 4, 1809 | |
| Joseph Hiester | Democratic-Republican | 5th | December 1, 1797 – March 4, 1803 | |
| Joseph Hiester | Democratic-Republican | 3rd | March 4, 1803 – March 4, 1805 | |
| Joseph Hiester | Democratic-Republican | 7th | March 4, 1815 – December ????, 1820 | |
| William Hiester | Anti-Masonic | 4th | March 4, 1831 – March 4, 1837 | |
| William H. Hines | Democratic | 12th | March 4, 1893 – March 4, 1895 | |
| Daniel K. Hoch | Democratic | 14th | January 3, 1943 – January 3, 1945 | |
| Daniel K. Hoch | Democratic | 13th | January 3, 1945 – January 3, 1947 | |
| Joe Hoeffel | Democratic | 13th | January 3, 1999 – January 3, 2005 | |
| Carl H. Hoffman | Republican | 23rd | May 21, 1946 – January 3, 1947 | |
| John Hoge | Democratic-Republican | 10th | November 2, 1804 – March 4, 1805 | |
| William Hoge | Democratic-Republican | 12th | March 4, 1801 – March 4, 1803 | Resigned. |
| William Hoge | Democratic-Republican | 10th | March 4, 1803 – October 15, 1804 | Resigned. |
| William Hoge | Democratic-Republican | 10th | March 4, 1807 – March 4, 1809 | |
| Tim Holden | Democratic | 6th | January 3, 1993 – January 3, 2003 | Redistricted. |
| Tim Holden | Democratic | 17th | January 3, 2003 – January 3, 2013 | Lost renomination. |
| Elmer J. Holland | Democratic | 33rd | May 19, 1942 – January 3, 1943 | |
| Elmer J. Holland | Democratic | 30th | January 24, 1956 – January 3, 1963 | |
| Elmer J. Holland | Democratic | 20th | January 3, 1963 – August 9, 1968 | |
| Enos Hook | Democratic | 20th | March 4, 1839 – April 18, 1841 | Resigned. |
| Albert C. Hopkins | Republican | 16th | March 4, 1891 – March 4, 1895 | |
| James H Hopkins | Democratic | 22nd | March 4, 1875 – March 4, 1877 | |
| James H Hopkins | Democratic | 22nd | March 4, 1883 – March 4, 1885 | |
| Joseph Hopkinson | Federalist | 1st | March 4, 1815 – March 4, 1819 | |
| Robert F. Hopwood | Republican | 23rd | March 4, 1915 – March 4, 1917 | |
| Henry Horn | Jacksonian | 2nd | March 4, 1831 – March 4, 1833 | |
| John W. Hornbeck | Whig | 6th | March 4, 1847 – January 16, 1848 | Died. |
| Jacob Hostetter | Democratic-Republican | 4th | November 16, 1818 – March 4, 1821 | |
| Chrissy Houlahan | Democratic | 6th | January 3, 2019 – present | Incumbent |
| John W. Howe | Free Soil | 22nd | March 4, 1849 – March 4, 1851 | |
| John W. Howe | Whig | 22nd | March 4, 1851 – March 4, 1853 | |
| Thomas M Howe | Whig | 21st | March 4, 1851 – March 4, 1853 | |
| Thomas M Howe | Whig | 22nd | March 4, 1853 – March 4, 1855 | |
| George Howell | Democratic | 10th | March 4, 1903 – February 10, 1904 | Lost election contest to William Connell. |
| Edward B Hubley | Jacksonian | 8th | March 4, 1835 – March 4, 1837 | |
| Edward B Hubley | Democratic | 8th | March 4, 1837 – March 4, 1839 | |
| George F Huff | Republican | 21st | March 4, 1891 – March 4, 1893 | |
| George F Huff | Republican | At-large | March 4, 1895 – March 4, 1897 | |
| George F Huff | Republican | 22nd | March 4, 1903 – March 4, 1911 | |
| Willis J. Hulings | Progressive | 28th | March 4, 1913 – March 4, 1915 | |
| Willis J. Hulings | Republican | 28th | March 4, 1919 – March 4, 1921 | |
| John M. Hyneman | Democratic-Republican | 3rd | March 4, 1811 – March 4, 1813 | Resigned. |
| John M. Hyneman | Democratic-Republican | 7th | March 4, 1813 – August 2, 1813 | Resigned. |
| Peter Ihrie, Jr. | Jacksonian | 8th | October 13, 1829 – March 4, 1833 | |
| Charles J Ingersoll | Democratic-Republican | 1st | March 4, 1813 – March 4, 1815 | |
| Charles J Ingersoll | Democratic | 3rd | March 4, 1841 – March 4, 1843 | |
| Charles J Ingersoll | Democratic | 4th | March 4, 1843 – March 4, 1849 | |
| Joseph R Ingersoll | Anti-Jacksonian | 2nd | March 4, 1835 – March 4, 1837 | |
| Joseph R Ingersoll | Whig | 2nd | October 12, 1841 – March 4, 1849 | |
| Samuel D. Ingham | Democratic-Republican | 6th | March 4, 1813 – July 6, 1818 | Resigned. |
| Samuel D. Ingham | Democratic-Republican | 6th | October 8, 1822 – March 4, 1823 | |
| Alexander Irvin | Whig | 24th | March 4, 1847 – March 4, 1849 | |
| James Irvin | Whig | 14th | March 4, 1841 – March 4, 1843 | |
| James Irvin | Whig | 17th | March 4, 1843 – March 4, 1845 | |
| William Irvine | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| Jared Irwin | Democratic-Republican | 10th | March 4, 1813 – March 4, 1817 | |
| Thomas Irwin | Jacksonian | 14th | March 4, 1829 – March 4, 1831 | |
| William W. Irwin | Whig | 22nd | March 4, 1841 – March 4, 1843 | |
| Summers M. Jack | Republican | 21st | March 4, 1899 – March 4, 1903 | |
| William Jack | Democratic | 23rd | March 4, 1841 – March 4, 1843 | |
| Oscar L. Jackson | Republican | 24th | March 4, 1885 – March 4, 1889 | |
| Israel Jacobs | Pro-Administration | 3rd | March 4, 1791 – March 4, 1793 | |
| Cornelius C. Jadwin | Republican | 15th | March 4, 1881 – March 4, 1883 | |
| Benjamin F. James | Republican | 7th | January 3, 1949 – January 3, 1959 | |
| Francis James | Anti-Masonic | 4th | March 4, 1839 – March 4, 1841 | |
| Francis James | Whig | 4th | March 4, 1841 – March 4, 1843 | |
| Benjamin Jarrett | Republican | 20th | January 3, 1937 – January 3, 1943 | |
| Mitchell Jenkins | Republican | 11th | January 3, 1947 – January 3, 1949 | |
| Robert Jenkins | Federalist | 3rd | March 4, 1807 – March 4, 1811 | |
| George A. Jenks | Democratic | 25th | March 4, 1875 – March 4, 1877 | |
| Michael H. Jenks | Whig | 6th | March 4, 1843 – March 4, 1845 | |
| Albert W. Johnson | Republican | 23rd | November 5, 1963 – January 3, 1977 | |
| Philip Johnson | Democratic | 13th | March 4, 1861 – March 4, 1863 | Died. |
| Philip Johnson | Democratic | 11th | March 4, 1863 – January 29, 1867 | Died. |
| Evan J. Jones | Republican | 21st | March 4, 1919 – March 4, 1923 | |
| J Glancy Jones | Democratic | 9th | March 4, 1851 – March 4, 1853 | |
| J Glancy Jones | Democratic | 8th | February 4, 1854 – October 30, 1858 | Resigned to become Minister to Austria. |
| Owen Jones | Democratic | 5th | March 4, 1857 – March 4, 1859 | |
| William Jones | Democratic-Republican | 1st | March 4, 1801 – March 4, 1803 | |
| Edwin J. Jorden | Republican | 15th | February 23, 1895 – March 4, 1895 | |
| John Joyce | Republican | 13th | January 3, 2019 – present | Incumbent |
| Benjamin F. Junkin | Republican | 16th | March 4, 1859 – March 4, 1861 | |
| Paul E. Kanjorski | Democratic | 11th | January 3, 1985 – January 3, 2011 | |
| Carroll D. Kearns | Republican | 28th | January 3, 1947 – January 3, 1953 | |
| Carroll D. Kearns | Republican | 24th | January 3, 1953 – January 3, 1963 | |
| George M. Keim | Democratic | 9th | March 17, 1838 – March 4, 1843 | |
| William H. Keim | Republican | 8th | December 7, 1858 – March 4, 1859 | |
| Abraham L. Keister | Republican | 22nd | March 4, 1913 – March 4, 1917 | |
| Fred Keller | Republican | 12th | May 21, 2019 – January 3, 2023 | Retired. |
| Augustine B. Kelley | Democratic | 28th | January 3, 1941 – January 3, 1945 | Died. |
| Augustine B. Kelley | Democratic | 27th | January 3, 1945 – January 3, 1953 | Died. |
| Augustine B. Kelley | Democratic | 21st | January 3, 1953 – November 20, 1957 | Died. |
| William D. Kelley | Republican | 4th | March 4, 1861 – January 9, 1890 | Died. |
| James Kelly | Federalist | 6th | March 4, 1805 – March 4, 1809 | |
| Mike Kelly | Republican | 3rd | January 3, 2011 – January 3, 2019 | Redistricted. |
| Mike Kelly | Republican | 16th | January 3, 2019 – present | Incumbent |
| M. Clyde Kelly | Republican | 30th | March 4, 1913 – March 4, 1915 | |
| M. Clyde Kelly | Progressive | 30th | March 4, 1917 – March 4, 1919 | |
| M. Clyde Kelly | Republican | 30th | March 4, 1919 – March 4, 1923 | |
| M. Clyde Kelly | Republican | 33rd | March 4, 1923 – January 3, 1933 | |
| M. Clyde Kelly | Republican | 31st | March 4, 1933 – January 3, 1935 | |
| Samuel A Kendall | Republican | 23rd | March 4, 1919 – March 4, 1923 | Died. |
| Samuel A Kendall | Republican | 24th | March 4, 1923 – January 8, 1933 | Died. |
| Everett Kent | Democratic | 30th | March 4, 1923 – March 4, 1925 | |
| Everett Kent | Democratic | 30th | March 4, 1927 – March 4, 1929 | |
| James Kerr | Democratic | 28th | March 4, 1889 – March 4, 1891 | |
| Winthrop W. Ketcham | Republican | 12th | March 4, 1875 – July 19, 1876 | Resigned after being appointed judge of the United States District Court for the Western District of Pennsylvania. |
| Edgar R Kiess | Republican | 15th | March 4, 1913 – March 4, 1923 | Died. |
| Edgar R Kiess | Republican | 16th | March 4, 1923 – July 20, 1930 | Died. |
| John W Killinger | Republican | 10th | March 4, 1859 – March 4, 1863 | |
| John W Killinger | Republican | 10th | March 4, 1871 – March 4, 1875 | |
| John W Killinger | Republican | 14th | March 4, 1877 – March 4, 1881 | |
| Adam King | Jacksonian | 10th | March 4, 1827 – March 4, 1833 | |
| Henry King | Jacksonian | 7th | March 4, 1831 – March 4, 1833 | |
| Henry King | Jacksonian | 8th | March 4, 1833 – March 4, 1835 | |
| Karl C. King | Republican | 8th | November 6, 1951 – January 3, 1957 | |
| J. Roland Kinzer | Republican | 10th | January 28, 1930 – January 3, 1945 | |
| J. Roland Kinzer | Republican | 9th | January 3, 1945 – January 3, 1947 | |
| George W Kipp | Democratic | 14th | March 4, 1907 – March 4, 1909 | |
| George W Kipp | Democratic | 14th | March 4, 1911 – July 24, 1911 | Died. |
| William H. Kirkpatrick | Republican | 26th | March 4, 1921 – March 4, 1923 | |
| William S. Kirkpatrick | Republican | 8th | March 4, 1897 – March 4, 1899 | |
| John W. Kittera | Pro-Administration | 5th | March 4, 1791 – March 4, 1793 | |
| John W. Kittera | Pro-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| John W. Kittera | Federalist | 7th | March 4, 1795 – March 3, 1801 | |
| Thomas Kittera | Anti-Jacksonian | 2nd | October 26, 1826 – March 4, 1827 | |
| I. Clinton Kline | Republican | 16th | March 4, 1921 – March 4, 1923 | |
| Marcus C. L. Kline | Democratic | 13th | March 4, 1903 – March 4, 1907 | |
| John Klingensmith, Jr. | Jacksonian | 19th | March 4, 1835 – March 4, 1837 | |
| John Klingensmith, Jr. | Democratic | 19th | March 4, 1837 – March 4, 1839 | |
| Ron Klink | Democratic | 4th | January 3, 1993 – January 3, 2001 | |
| Robert Klotz | Democratic | 11th | March 4, 1879 – March 4, 1883 | |
| Jonathan Knight | Opposition | 20th | March 4, 1855 – March 4, 1857 | |
| Joseph P. Kolter | Democratic | 4th | January 3, 1983 – January 3, 1993 | |
| William H. Koontz | Republican | 16th | July 18, 1866 – March 4, 1869 | |
| Peter H. Kostmayer | Democratic | 8th | January 3, 1977 – January 3, 1981 | |
| Peter H. Kostmayer | Democratic | 8th | January 3, 1983 – January 3, 1993 | |
| Jacob Krebs | Jacksonian | 7th | December 4, 1826 – March 4, 1827 | |
| Aaron S. Kreider | Republican | 18th | March 4, 1913 – March 4, 1923 | |
| George Kremer | Democratic-Republican | 9th | March 4, 1823 – March 4, 1825 | |
| George Kremer | Jacksonian | 9th | March 4, 1825 – March 4, 1829 | |
| George F. Kribbs | Democratic | 28th | March 4, 1891 – March 4, 1895 | |
| Joseph H. Kuhns | Whig | 19th | March 4, 1851 – March 4, 1853 | |
| Monroe H. Kulp | Republican | 17th | March 4, 1895 – March 4, 1899 | |
| John Christian Kunkel | Opposition | 10th | March 4, 1855 – March 4, 1857 | |
| John Christian Kunkel | Republican | 10th | March 4, 1857 – March 4, 1859 | |
| John C. Kunkel | Republican | 19th | January 3, 1939 – January 3, 1945 | |
| John C. Kunkel | Republican | 18th | January 3, 1945 – January 3, 1951 | |
| John C. Kunkel | Republican | 16th | May 16, 1961 – December 30, 1966 | Resigned. |
| J Banks Kurtz | Republican | 21st | March 4, 1923 – March 4, 1933 | |
| J Banks Kurtz | Republican | 23rd | March 4, 1933 – January 3, 1935 | |
| William H Kurtz | Democratic | 15th | March 4, 1851 – March 4, 1853 | |
| William H Kurtz | Democratic | 16th | March 4, 1853 – March 4, 1855 | |
| Abner Lacock | Democratic-Republican | 11th | March 4, 1811 – March 4, 1813 | |
| Daniel F. Lafean | Republican | 20th | March 4, 1903 – March 4, 1913 | |
| Daniel F. Lafean | Republican | At-large | March 4, 1915 – March 4, 1917 | |
| John A. Lafore, Jr. | Republican | 13th | November 5, 1957 – January 3, 1961 | |
| Conor Lamb | Democratic | 18th | March 13, 2018 – January 3, 2019 | Switched districts. |
| Conor Lamb | Democratic | 17th | January 3, 2019 – January 3, 2023 | Retired to run for U.S. senator. |
| James Landy | Democratic | 3rd | March 4, 1857 – March 4, 1859 | |
| J. N. Langham | Republican | 27th | March 4, 1909 – March 4, 1915 | |
| John Laporte | Jacksonian | 17th | March 4, 1833 – March 4, 1837 | |
| George V. E Lawrence | Republican | 24th | March 4, 1865 – March 4, 1869 | |
| George V. E Lawrence | Republican | 24th | March 4, 1883 – March 4, 1885 | |
| Joseph Lawrence | Anti-Jacksonian | 15th | March 4, 1825 – March 4, 1829 | |
| Joseph Lawrence | Whig | 21st | March 4, 1841 – April 17, 1842 | Died. |
| Jesse Lazear | Democratic | 20th | March 4, 1861 – March 4, 1863 | |
| Jesse Lazear | Democratic | 24th | March 4, 1863 – March 4, 1865 | |
| Raymond F. Lederer | Democratic | 3rd | January 3, 1977 – April 29, 1981 | Resigned. |
| Robert E. Lee | Democratic | 12th | March 4, 1911 – March 4, 1915 | |
| Summer Lee | Democratic | 12th | January 3, 2023 – present | Incumbent |
| J. Russell Leech | Republican | 20th | March 4, 1927 – January 29, 1932 | resigned on appointment as member of US Board of Tax Appeals |
| Isaac Leet | Democratic | 21st | March 4, 1839 – March 4, 1841 | |
| Joseph Lefever | Democratic-Republican | 3rd | March 4, 1811 – March 4, 1813 | |
| William E. Lehman | Democratic | 1st | March 4, 1861 – March 4, 1863 | |
| Michael Leib | Democratic-Republican | 2nd | March 4, 1799 – March 4, 1803 | Resigned. |
| Michael Leib | Democratic-Republican | 1st | March 4, 1803 – February 14, 1806 | Resigned. |
| Owen D. Leib | Democratic | 11th | March 4, 1845 – March 4, 1847 | |
| Paul Leidy | Democratic | 12th | December 7, 1857 – March 4, 1859 | |
| George G. Leiper | Jacksonian | 4th | March 4, 1829 – March 4, 1831 | |
| John Leisenring | Republican | 12th | March 4, 1895 – March 4, 1897 | |
| John T. Lenahan | Democratic | 11th | March 4, 1907 – March 4, 1909 | |
| Fred C. Leonard | Republican | 16th | March 4, 1895 – March 4, 1897 | |
| John V. Lesher | Democratic | 16th | March 4, 1913 – March 4, 1921 | |
| Lewis C. Levin | Know Nothing | 1st | March 4, 1845 – March 4, 1851 | |
| Fred E. Lewis | Republican | At-large | March 4, 1913 – March 4, 1915 | |
| Robert J. Lewis | Republican | 19th | March 4, 1901 – March 4, 1903 | |
| Norton L. Lichtenwalner | Democratic | 14th | March 4, 1931 – March 4, 1933 | |
| Franklin H. Lichtenwalter | Republican | 8th | September 9, 1947 – January 3, 1951 | |
| Michael Liebel, Jr. | Democratic | 25th | March 4, 1915 – March 4, 1917 | |
| Mial E. Lilley | Republican | 14th | March 4, 1905 – March 4, 1907 | |
| William Lilly | Republican | At-large | March 4, 1893 – December 1, 1893 | Died. |
| James F. Lind | Democratic | 21st | January 3, 1949 – January 3, 1953 | |
| Henry Logan | Jacksonian | 11th | March 4, 1835 – March 4, 1837 | |
| Henry Logan | Democratic | 11th | March 4, 1837 – March 4, 1839 | |
| J. Washington Logue | Democratic | 6th | March 4, 1913 – March 4, 1915 | |
| Henry C. Longnecker | Republican | 7th | March 4, 1859 – March 4, 1861 | |
| Christian Lower | Democratic-Republican | 3rd | March 4, 1805 – December 19, 1806 | Died. |
| John B. C. Lucas | Democratic-Republican | 11th | March 4, 1803 – ????, 1805 | Resigned before the assembling of the 9th Congress to become district judge of the United States District Court for the District of Louisiana. |
| Aaron Lyle | Democratic-Republican | 10th | March 4, 1809 – March 4, 1813 | |
| Aaron Lyle | Democratic-Republican | 12th | March 4, 1813 – March 4, 1817 | |
| John Lynch | Democratic | 12th | March 4, 1887 – March 4, 1889 | |
| Ryan Mackenzie | Republican | 7th | January 3, 2025 – present | Incumbent |
| Levi A. Mackey | Democratic | 20th | March 4, 1875 – March 4, 1879 | |
| Samuel Maclay | Democratic-Republican | 6th | March 4, 1795 – March 4, 1797 | |
| William Maclay | Democratic-Republican | 5th | March 4, 1815 – March 4, 1819 | |
| William P. Maclay | Democratic-Republican | 9th | October 8, 1816 – March 4, 1821 | |
| James T. Maffett | Republican | 25th | March 4, 1887 – March 4, 1889 | |
| James M. Magee | Republican | 35th | March 4, 1923 – March 4, 1927 | |
| John A. Magee | Democratic | 15th | March 4, 1873 – March 4, 1875 | |
| Frederick W. Magrady | Republican | 17th | March 4, 1925 – March 4, 1933 | |
| Thaddeus M Mahon | Republican | 18th | March 4, 1893 – March 4, 1903 | |
| Thaddeus M Mahon | Republican | 17th | March 4, 1903 – March 4, 1907 | |
| Levi Maish | Democratic | 19th | March 4, 1875 – March 4, 1879 | |
| Levi Maish | Democratic | 19th | March 4, 1887 – March 4, 1891 | |
| Franklin J. Maloney | Republican | 4th | January 3, 1947 – January 3, 1949 | |
| Job Mann | Jacksonian | 18th | March 4, 1835 – March 4, 1837 | |
| Job Mann | Democratic | 19th | March 4, 1847 – March 4, 1851 | |
| Joel K. Mann | Jacksonian | 5th | March 4, 1831 – March 4, 1835 | |
| Albert G. Marchand | Democratic | 19th | March 4, 1839 – March 4, 1843 | |
| David Marchand | Democratic-Republican | 11th | March 4, 1817 – March 4, 1821 | |
| Marjorie Margolies-Mezvinsky | Democratic | 13th | January 3, 1993 – January 3, 1995 | Lost re-election. |
| Tom Marino | Republican | 10th | January 3, 2011 – January 3, 2019 | Redistricted. |
| Tom Marino | Republican | 12th | January 3, 2019 – January 23, 2019 | Resigned. |
| Philip S Markley | Democratic-Republican | 5th | March 4, 1823 – March 4, 1825 | |
| Philip S Markley | Anti-Jacksonian | 5th | March 4, 1825 – March 4, 1827 | |
| Marc L. Marks | Republican | 24th | January 3, 1977 – January 3, 1983 | |
| Alem Marr | Jacksonian | 9th | March 4, 1829 – March 4, 1831 | |
| Frank Mascara | Democratic | 20th | January 3, 1995 – January 3, 2003 | |
| Charles Matthews | Republican | 24th | March 4, 1911 – March 4, 1913 | |
| William McAleer | Democratic | 3rd | March 4, 1891 – March 4, 1895 | |
| William McAleer | Democratic | 3rd | March 4, 1897 – March 4, 1901 | |
| Archibald McAllister | Democratic | 17th | March 4, 1863 – March 4, 1865 | |
| Joseph A. McArdle | Democratic | 33rd | January 3, 1939 – January 5, 1942 | Resigned to serve on Pittsburgh City Council. |
| Moses McClean | Democratic | 15th | March 4, 1845 – March 4, 1847 | |
| William McClelland | Democratic | 24th | March 4, 1871 – March 4, 1873 | |
| Blair McClenachan | Democratic-Republican | 2nd | March 4, 1797 – March 4, 1799 | |
| Charles McClure | Democratic | 13th | March 4, 1837 – March 4, 1839 | |
| Charles McClure | Democratic | 13th | December 7, 1840 – March 4, 1841 | |
| Samuel K. McConnell, Jr. | Republican | 17th | January 18, 1944 – January 3, 1945 | Resigned. |
| Samuel K. McConnell, Jr. | Republican | 16th | January 3, 1945 – January 3, 1953 | Resigned. |
| Samuel K. McConnell, Jr. | Republican | 13th | January 3, 1953 – September 1, 1957 | Resigned. |
| Henry C. McCormick | Republican | 16th | March 4, 1887 – March 4, 1891 | |
| Robert McCoy | Jacksonian | 11th | November 22, 1831 – March 4, 1833 | |
| George D. McCreary | Republican | 6th | March 4, 1903 – March 4, 1913 | |
| William McCreery | Democratic | 15th | March 4, 1829 – March 4, 1831 | |
| George McCulloch | Democratic | 14th | November 20, 1839 – March 4, 1841 | |
| John McCulloch | Whig | 18th | March 4, 1853 – March 4, 1855 | |
| Welty McCullogh | Republican | 21st | March 4, 1887 – March 4, 1889 | |
| Thomas G. McCullough | Federalist | 5th | October 17, 1820 – March 4, 1821 | |
| Joseph M. McDade | Republican | 10th | January 3, 1963 – January 3, 1999 | |
| Alexander McDowell | Republican | At-large | March 4, 1893 – March 4, 1895 | |
| John McDowell | Republican | 31st | January 3, 1939 – January 3, 1941 | |
| John McDowell | Republican | 29th | January 3, 1947 – January 3, 1949 | |
| Louis T. McFadden | Republican | 14th | March 4, 1915 – March 4, 1923 | |
| Louis T. McFadden | Republican | 15th | March 4, 1923 – January 3, 1935 | |
| Robert N. McGarvey | Republican | 2nd | January 3, 1947 – January 3, 1949 | |
| Herbert J. McGlinchey | Democratic | 6th | January 3, 1945 – January 3, 1947 | |
| James P. McGranery | Democratic | 2nd | January 3, 1937 – November 17, 1943 | Resigned after being appointed an assistant to the Attorney General. |
| Paul McHale | Democratic | 15th | January 3, 1993 – January 3, 1999 | |
| John G. McHenry | Democratic | 16th | March 4, 1907 – December 27, 1912 | Died. |
| Abraham R. McIlvaine | Whig | 7th | March 4, 1843 – March 4, 1849 | |
| Ebenezer McJunkin | Republican | 23rd | March 4, 1871 – ????, 1874/1875 | |
| Samuel McKean | Democratic-Republican | 9th | March 4, 1823 – March 4, 1825 | |
| Samuel McKean | Jacksonian | 9th | March 4, 1825 – March 4, 1829 | |
| Thomas M. T McKennan | Anti-Masonic | 15th | March 4, 1831 – March 4, 1833 | |
| Thomas M. T McKennan | Anti-Masonic | 21st | March 4, 1833 – March 4, 1839 | |
| Thomas M. T McKennan | Whig | 21st | May 30, 1842 – March 4, 1843 | |
| Jacob K. McKenty | Democratic | 8th | December 3, 1860 – March 4, 1861 | |
| Robert McKnight | Republican | 22nd | March 4, 1859 – March 4, 1863 | |
| James X. McLanahan | Democratic | 16th | March 4, 1849 – March 4, 1853 | |
| Patrick McLane | Democratic | 10th | March 4, 1919 – February 25, 1921 | Lost election contest to John R. Farr. |
| Joseph McLaughlin | Republican | At-large | March 4, 1917 – March 4, 1919 | |
| Joseph McLaughlin | Republican | At-large | March 4, 1921 – March 4, 1923 | |
| John McNair | Democratic | 5th | March 4, 1851 – March 4, 1855 | |
| Edward McPherson | Republican | 17th | March 4, 1859 – March 4, 1863 | |
| James McSherry | Federalist | 5th | March 4, 1821 – March 4, 1823 | |
| Pat Meehan | Republican | 7th | January 3, 2011 – April 27, 2018 | Resigned. |
| Franklin Menges | Republican | 22nd | March 4, 1925 – March 4, 1931 | |
| Ulysses Mercur | Republican | 13th | March 4, 1865 – December 2, 1872 | Resigned after being appointed as judge of the Supreme Court of Pennsylvania. |
| Dan Meuser | Republican | 9th | January 3, 2019 – present | Incumbent |
| Benjamin F. Meyers | Democratic | 16th | March 4, 1871 – March 4, 1873 | |
| Ner Middleswarth | Whig | 10th | March 4, 1853 – March 4, 1855 | |
| Daniel H. Miller | Democratic-Republican | 3rd | March 4, 1823 – March 4, 1825 | |
| Daniel H. Miller | Jacksonian | 3rd | March 4, 1825 – March 4, 1831 | |
| George F. Miller | Republican | 14th | March 4, 1865 – March 4, 1869 | |
| Jesse Miller | Jacksonian | 13th | March 4, 1833 – October 30, 1836 | Resigned to become the First Auditor of the United States Department of the Treasury. |
| Samuel H Miller | Republican | 26th | March 4, 1881 – March 4, 1885 | |
| Samuel H Miller | Republican | 28th | March 4, 1915 – March 4, 1917 | |
| Thomas B. Miller | Republican | 12th | May 19, 1942 – January 3, 1945 | |
| William H. Miller | Democratic | 14th | March 4, 1863 – March 4, 1865 | |
| William H. Milliken, Jr. | Republican | 7th | January 3, 1959 – January 3, 1965 | |
| William Millward | Opposition | 3rd | March 4, 1855 – March 4, 1857 | |
| William Millward | Republican | 4th | March 4, 1859 – March 4, 1861 | |
| James Milnor | Federalist | 1st | March 4, 1811 – March 4, 1813 | |
| William Milnor | Federalist | 2nd | March 4, 1807 – March 4, 1811 | |
| William Milnor | Federalist | 1st | March 4, 1815 – March 4, 1817 | |
| William Milnor | Federalist | 1st | March 4, 1819 – May 8, 1822 | Resigned. |
| Charles Miner | Anti-Jacksonian | 4th | March 4, 1825 – March 4, 1829 | |
| James S. Mitchell | Democratic-Republican | 4th | March 4, 1821 – March 4, 1823 | |
| James S. Mitchell | Democratic-Republican | 10th | March 4, 1823 – March 4, 1825 | |
| James S. Mitchell | Jacksonian | 10th | March 4, 1825 – March 4, 1827 | |
| John I. Mitchell | Republican | 16th | March 4, 1877 – March 4, 1881 | |
| John Mitchell | Jacksonian | 12th | March 4, 1825 – March 4, 1829 | |
| John Moffet | Democratic | 3rd | March 4, 1869 – April 9, 1869 | Lost contested election to Leonard Myers. |
| Daniel Montgomery, Jr. | Democratic-Republican | 5th | March 4, 1807 – March 4, 1809 | |
| John G. Montgomery | Democratic | 12th | March 4, 1857 – April 24, 1857 | Died. |
| William Montgomery | Democratic | 20th | March 4, 1857 – March 4, 1861 | |
| William Montgomery | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| Reuben O. Moon | Republican | 4th | November 3, 1903 – March 4, 1913 | |
| Henry D. Moore | Whig | 3rd | March 4, 1849 – March 4, 1853 | |
| J. Hampton Moore | Republican | 3rd | November 6, 1906 – January 4, 1920 | Resigned after being elected Mayor of Philadelphia. |
| Robert Moore | Democratic-Republican | 15th | March 4, 1817 – March 4, 1821 | |
| Samuel Moore | Democratic-Republican | 6th | October 13, 1818 – May 20, 1822 | |
| William S. Moore | Republican | 24th | March 4, 1873 – March 4, 1875 | |
| James K. Moorhead | Republican | 21st | March 4, 1859 – March 4, 1863 | |
| James K. Moorhead | Republican | 22nd | March 4, 1863 – March 4, 1869 | |
| William S. Moorhead | Democratic | 28th | January 3, 1959 – January 3, 1963 | |
| William S. Moorhead | Democratic | 14th | January 3, 1963 – January 3, 1981 | |
| Thomas E. Morgan | Democratic | 24th | January 3, 1945 – January 3, 1953 | |
| Thomas E. Morgan | Democratic | 26th | January 3, 1953 – January 3, 1973 | |
| Thomas E. Morgan | Democratic | 22nd | January 3, 1973 – January 3, 1977 | |
| John M. Morin | Republican | At-large | March 4, 1913 – March 4, 1915 | |
| John M. Morin | Republican | 31st | March 4, 1915 – March 4, 1923 | |
| John M. Morin | Republican | 34th | March 4, 1923 – March 4, 1929 | |
| Theodore L. Moritz | Democratic | 32nd | January 3, 1935 – January 3, 1937 | |
| Daniel J. Morrell | Republican | 17th | March 4, 1867 – March 4, 1871 | |
| Edward de Veaux Morrell | Republican | 5th | November 6, 1900 – March 4, 1907 | |
| Edward J Morris | Whig | 1st | March 4, 1843 – March 4, 1845 | |
| Edward J Morris | Whig | 2nd | March 4, 1857 – June 8, 1861 | Resigned to become Minister to the Ottoman Empire. |
| Mathias Morris | Anti-Jacksonian | 6th | March 4, 1835 – March 4, 1837 | |
| Mathias Morris | Whig | 6th | March 4, 1837 – March 4, 1839 | |
| Samuel W. Morris | Democratic | 17th | March 4, 1837 – March 4, 1841 | |
| John A. Morrison | Democratic | 7th | March 4, 1851 – March 4, 1853 | |
| Guy L. Moser | Democratic | 14th | January 3, 1937 – January 3, 1943 | |
| James Mosgrove | Greenback | 25th | March 4, 1881 – March 4, 1883 | |
| Frederick A. Muhlenberg | Republican | 13th | January 3, 1947 – January 3, 1949 | |
| Frederick A. C. Muhlenberg | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| Frederick A. C. Muhlenberg | Anti-Administration | 2nd | March 4, 1791 – March 4, 1793 | |
| Frederick A. C. Muhlenberg | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| Frederick A. C. Muhlenberg | Democratic-Republican | 2nd | March 4, 1795 – March 4, 1797 | |
| Henry A. Muhlenberg | Democratic | 8th | March 4, 1853 – January 9, 1854 | Died. |
| Henry A. P. Muhlenberg | Jacksonian | 7th | March 4, 1829 – March 4, 1833 | Resigned to become United States Minister to the Austrian Empire. |
| Henry A. P. Muhlenberg | Jacksonian | 9th | March 4, 1833 – March 4, 1837 | Resigned to become United States Minister to the Austrian Empire. |
| Henry A. P. Muhlenberg | Democratic | 9th | March 4, 1837 – February 8, 1838 | Resigned to become United States Minister to the Austrian Empire. |
| Peter Muhlenberg | Anti-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| Peter Muhlenberg | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| Peter Muhlenberg | Democratic-Republican | 4th | March 4, 1799 – March 4, 1801 | |
| Michael J. Muldowney | Republican | 32nd | March 4, 1933 – January 3, 1935 | |
| Walter M. Mumma | Republican | 18th | January 3, 1951 – January 3, 1953 | Died. |
| Walter M. Mumma | Republican | 16th | January 3, 1953 – February 25, 1961 | Died. |
| Austin J Murphy | Democratic | 22nd | January 3, 1977 – January 3, 1993 | |
| Austin J Murphy | Democratic | 20th | January 3, 1993 – January 3, 1995 | |
| John W. Murphy | Democratic | 11th | January 3, 1943 – January 3, 1945 | Resigned to become judge of the United States District Court for the Middle District of Pennsylvania. |
| John W. Murphy | Democratic | 10th | January 3, 1945 – July 17, 1946 | Resigned to become judge of the United States District Court for the Middle District of Pennsylvania. |
| Patrick Murphy | Democratic | 8th | January 3, 2007 – January 3, 2011 | Lost re-election. |
| Timothy F. Murphy | Republican | 18th | January 3, 2003 – October 21, 2017 | Resigned. |
| John Murray | Democratic-Republican | 10th | October 14, 1817 – March 4, 1821 | First elected to finish Representative-elect David Scott's term. |
| Thomas Murray, Jr. | Democratic-Republican | 10th | October 9, 1821 – March 4, 1823 | First elected to finish Representative-elect William Cox Ellis's term. |
| John Murtha | Democratic | 12th | February 5, 1974 – February 8, 2010 | Died. |
| Ray Musto | Democratic | 11th | April 9, 1980 – January 3, 1981 | |
| Howard Mutchler | Democratic | 8th | August 7, 1893 – March 4, 1895 | |
| Howard Mutchler | Democratic | 8th | March 4, 1901 – March 4, 1903 | |
| William Mutchler | Democratic | 10th | March 4, 1875 – March 4, 1877 | |
| William Mutchler | Democratic | 10th | March 4, 1881 – March 4, 1885 | |
| William Mutchler | Democratic | 8th | March 4, 1889 – June 23, 1893 | Died. |
| Amos Myers | Republican | 20th | March 4, 1863 – March 4, 1865 | |
| Francis J. Myers | Democratic | 6th | January 3, 1939 – January 3, 1945 | |
| Gary A. Myers | Republican | 25th | January 3, 1975 – January 3, 1979 | |
| Leonard Myers | Republican | 3rd | March 4, 1863 – March 4, 1869 | |
| Leonard Myers | Republican | 3rd | April 9, 1869 – March 4, 1875 | Successfully challenged election of John Moffet. |
| Michael Myers | Democratic | 1st | November 2, 1976 – October 2, 1980 | Expelled as a result of the Abscam scandal. |
| Charles Naylor | Whig | 3rd | June 29, 1837 – March 4, 1841 | First elected to finish Representative-elect Francis J. Harper's term. |
| James S. Negley | Republican | 22nd | March 4, 1869 – March 4, 1875 | |
| James S. Negley | Republican | 22nd | March 4, 1885 – March 4, 1887 | |
| James L. Nelligan | Republican | 11th | January 3, 1981 – January 3, 1983 | |
| Henry Nes | Independent Democratic | 15th | March 4, 1843 – March 4, 1845 | |
| Henry Nes | Whig | 15th | March 4, 1847 – September 10, 1850 | Died. |
| Peter Newhard | Democratic | 8th | March 4, 1839 – March 4, 1843 | |
| Thomas D. Nicholls | Independent Democratic | 10th | March 4, 1907 – March 4, 1911 | |
| Robert N.C. Nix, Sr. | Democratic | 4th | May 20, 1958 – January 3, 1963 | |
| Robert N.C. Nix, Sr. | Democratic | 2nd | January 3, 1963 – January 3, 1979 | |
| Solomon T. North | Republican | 27th | March 4, 1915 – March 4, 1917 | |
| Charles O'Neill | Republican | 2nd | March 4, 1863 – March 4, 1871 | |
| Charles O'Neill | Republican | 2nd | March 4, 1873 – November 25, 1893 | Died. |
| Harry P. O'Neill | Democratic | 10th | January 3, 1949 – January 3, 1953 | |
| Alexander Ogle | Democratic-Republican | 8th | March 4, 1817 – March 4, 1819 | |
| Andrew J. Ogle | Whig | 18th | March 4, 1849 – March 4, 1851 | |
| Charles Ogle | Anti-Masonic | 18th | March 4, 1837 – March 4, 1841 | |
| Charles Ogle | Whig | 18th | March 4, 1841 – May 10, 1841 | Died. |
| Marlin E Olmsted | Republican | 14th | March 4, 1897 – March 4, 1903 | |
| Marlin E Olmsted | Republican | 18th | March 4, 1903 – March 4, 1913 | |
| Robert Orr, Jr. | Jacksonian | 16th | October 11, 1825 – March 4, 1829 | |
| Edwin S Osborne | Republican | At-large | March 4, 1885 – March 4, 1889 | |
| Edwin S Osborne | Republican | 12th | March 4, 1889 – March 4, 1891 | |
| James H. Osmer | Republican | 27th | March 4, 1879 – March 4, 1881 | |
| Edward Overton, Jr. | Republican | 15th | March 4, 1877 – March 4, 1881 | |
| Asa Packer | Democratic | 13th | March 4, 1853 – March 4, 1857 | |
| Horace B. Packer | Republican | 16th | March 4, 1897 – March 4, 1901 | |
| John B. Packer | Republican | 14th | March 4, 1869 – March 4, 1877 | |
| A. Mitchell Palmer | Democratic | 26th | March 4, 1909 – March 4, 1915 | |
| Cyrus M. Palmer | Republican | 13th | March 4, 1927 – March 4, 1929 | |
| Henry W Palmer | Republican | 12th | March 4, 1901 – March 4, 1903 | |
| Henry W Palmer | Republican | 11th | March 4, 1903 – March 4, 1907 | |
| Henry W Palmer | Republican | 11th | March 4, 1909 – March 4, 1911 | |
| Andrew Parker | Democratic | 17th | March 4, 1851 – March 4, 1853 | |
| George R Patterson | Republican | 13th | March 4, 1901 – March 4, 1903 | Died. |
| George R Patterson | Republican | 12th | March 4, 1903 – March 21, 1906 | Died. |
| Thomas Patterson | Democratic-Republican | 12th | March 4, 1817 – March 4, 1823 | |
| Thomas Patterson | Democratic-Republican | 15th | March 4, 1823 – March 4, 1825 | |
| Charles E. Patton | Republican | 21st | March 4, 1911 – March 4, 1915 | |
| John Patton | Republican | 24th | March 4, 1861 – March 4, 1863 | |
| John Patton | Republican | 20th | March 4, 1887 – March 4, 1889 | |
| John D. Patton | Democratic | 25th | March 4, 1883 – March 4, 1885 | |
| Levi Pawling | Federalist | 2nd | March 4, 1807 – March 4, 1811 | |
| Lemuel Paynter | Democratic | 1st | March 4, 1837 – March 4, 1841 | |
| John J. Pearce | Opposition | 15th | March 4, 1855 – March 4, 1857 | |
| John J. Pearson | Anti-Jacksonian | 24th | December 5, 1836 – March 4, 1837 | |
| Scott Perry | Republican | 4th | January 3, 2012 – January 3, 2019 | Redistricted. |
| Scott Perry | Republican | 10th | January 3, 2019 – present | Incumbent |
| John E. Peterson | Republican | 5th | January 3, 1997 – January 3, 2009 | |
| David Petrikin | Democratic | 15th | March 4, 1837 – March 4, 1841 | |
| S. Newton Pettis | Republican | 20th | December 7, 1868 – March 4, 1869 | |
| Darwin Phelps | Republican | 23rd | March 4, 1869 – March 4, 1871 | |
| Henry M. Phillips | Democratic | 4th | March 4, 1857 – March 4, 1859 | |
| John Phillips | Federalist | 3rd | March 4, 1821 – March 4, 1823 | |
| Thomas W. Phillips | Republican | 25th | March 4, 1893 – March 4, 1897 | |
| Thomas Wharton Phillips Jr. | Republican | 26th | March 4, 1923 – March 4, 1927 | |
| Robert Philson | Democratic-Republican | 8th | March 4, 1819 – March 4, 1821 | |
| William Piper | Democratic-Republican | 7th | March 4, 1811 – March 4, 1813 | |
| William Piper | Democratic-Republican | 8th | March 4, 1813 – March 4, 1817 | |
| Charles W. Pitman | Whig | 14th | March 4, 1849 – March 4, 1851 | |
| Joseph R. Pitts | Republican | 16th | January 3, 1997 – January 3, 2017 | |
| Todd R. Platts | Republican | 19th | January 3, 2001 – January 3, 2013 | Retired. |
| Arnold Plumer | Democratic | 25th | March 4, 1837 – March 4, 1839 | |
| Arnold Plumer | Democratic | 25th | March 4, 1841 – March 4, 1843 | |
| George Plumer | Democratic-Republican | 11th | March 4, 1821 – March 4, 1823 | |
| George Plumer | Democratic-Republican | 17th | March 4, 1823 – March 4, 1825 | |
| George Plumer | Jacksonian | 17th | March 4, 1825 – March 4, 1827 | |
| Rufus K. Polk | Democratic | 17th | March 4, 1899 – March 5, 1902 | Died. |
| James Pollock | Whig | 13th | April 5, 1844 – March 4, 1849 | |
| Henry K. Porter | Independent Republican | 31st | March 4, 1903 – March 4, 1905 | |
| John Porter | Democratic-Republican | 1st | December 8, 1806 – March 4, 1811 | |
| Stephen G. Porter | Republican | 29th | March 4, 1911 – March 4, 1923 | Died. |
| Stephen G. Porter | Republican | 32nd | March 4, 1923 – June 27, 1930 | Died. |
| George A. Post | Democratic | 15th | March 4, 1883 – March 4, 1885 | |
| William W. Potter | Democratic | 14th | March 4, 1837 – October 28, 1839 | Died. |
| David Potts Jr. | Anti-Masonic | 4th | March 4, 1831 – March 4, 1839 | |
| Joseph Powell | Democratic | 15th | March 4, 1875 – March 4, 1877 | |
| C. Frederick Pracht | Republican | 5th | January 3, 1943 – January 3, 1945 | |
| Charles C. Pratt | Republican | 14th | March 4, 1909 – March 4, 1911 | |
| Joseph M. Pratt | Republican | 2nd | January 18, 1944 – January 3, 1945 | |
| Stanley A. Prokop | Democratic | 10th | January 3, 1959 – January 3, 1961 | |
| John Pugh | Democratic-Republican | 2nd | March 4, 1805 – March 4, 1809 | |
| Samuel A Purviance | Opposition | 22nd | March 4, 1855 – March 4, 1857 | |
| Samuel A Purviance | Republican | 22nd | March 4, 1857 – March 4, 1859 | |
| James M. Quigley | Democratic | 19th | January 3, 1955 – January 3, 1957 | |
| James M. Quigley | Democratic | 19th | January 3, 1959 – January 3, 1961 | |
| James L. Quinn | Democratic | 31st | January 3, 1935 – January 3, 1939 | |
| Alexander Ramsey | Whig | 14th | March 4, 1843 – March 4, 1847 | |
| Robert Ramsey | Jacksonian | 6th | March 4, 1833 – March 4, 1835 | |
| Robert Ramsey | Whig | 6th | March 4, 1841 – March 4, 1843 | |
| William Ramsey | Jacksonian | 11th | March 4, 1827 – September 29, 1831 | Died. |
| William S. Ramsey | Democratic | 13th | March 4, 1839 – October 17, 1840 | Died. |
| Samuel J. Randall | Democratic | 1st | March 4, 1863 – March 4, 1875 | Died. |
| Samuel J. Randall | Democratic | 3rd | March 4, 1875 – April 13, 1890 | Died. |
| Harry C. Ransley | Republican | 3rd | November 2, 1920 – March 4, 1933 | |
| Harry C. Ransley | Republican | 1st | March 4, 1933 – January 3, 1937 | |
| Joseph W. Ray | Republican | 24th | March 4, 1889 – March 4, 1891 | |
| John Rea | Democratic-Republican | 5th | May 11, 1813 – March 4, 1815 | |
| Almon H Read | Democratic | 17th | March 18, 1842 – March 4, 1843 | Died. |
| Almon H Read | Democratic | 12th | March 4, 1843 – June 3, 1844 | Died. |
| John R. Reading | Democratic | 5th | March 4, 1869 – April 13, 1870 | Lost contested election to Caleb N. Taylor |
| John Reber | Republican | 12th | May 23, 1919 – March 4, 1923 | |
| Charles M. Reed | Whig | 23rd | March 4, 1843 – March 4, 1845 | |
| Robert R. Reed | Whig | 20th | March 4, 1849 – March 4, 1851 | |
| James B Reilly | Democratic | 13th | March 4, 1875 – March 4, 1879 | |
| James B Reilly | Democratic | 13th | March 4, 1889 – March 4, 1895 | |
| John Reilly | Democratic | 17th | March 4, 1875 – March 4, 1877 | |
| Wilson Reilly | Democratic | 17th | March 4, 1857 – March 4, 1859 | |
| Luther Reily | Democratic | 10th | March 4, 1837 – March 4, 1839 | |
| Guy Reschenthaler | Republican | 14th | January 3, 2019 – present | Incumbent |
| John E. Reyburn | Republican | 4th | February 18, 1890 – March 4, 1897 | |
| John E. Reyburn | Republican | 2nd | November 6, 1906 – March 31, 1907 | Resigned to become Mayor of Philadelphia. |
| William S. Reyburn | Republican | 2nd | May 23, 1911 – March 4, 1913 | |
| John M. Reynolds | Republican | 19th | March 4, 1905 – January 17, 1911 | Resigned to become Lieutenant Governor of Pennsylvania. |
| George M. Rhodes | Democratic | 13th | January 3, 1949 – January 3, 1953 | |
| George M. Rhodes | Democratic | 14th | January 3, 1953 – January 3, 1963 | |
| George M. Rhodes | Democratic | 6th | January 3, 1963 – January 3, 1969 | |
| Robert F. Rich | Republican | 16th | November 4, 1930 – January 3, 1943 | |
| Robert F. Rich | Republican | 15th | January 3, 1945 – January 3, 1951 | |
| Jacob Richards | Democratic-Republican | 1st | March 4, 1803 – March 4, 1809 | |
| John Richards | Democratic-Republican | 4th | March 4, 1795 – March 4, 1797 | |
| Matthias Richards | Democratic-Republican | 3rd | March 4, 1807 – March 4, 1811 | |
| William E. Richardson | Democratic | 14th | March 4, 1933 – January 3, 1937 | |
| Hiram L. Richmond | Republican | 20th | March 4, 1873 – March 4, 1875 | |
| Tom Ridge | Republican | 21st | January 3, 1983 – January 3, 1995 | |
| John W. Rife | Republican | 14th | March 4, 1889 – March 4, 1893 | |
| David Ritchie | Whig | 21st | March 4, 1853 – March 4, 1855 | |
| David Ritchie | Opposition | 21st | March 4, 1855 – March 4, 1857 | |
| David Ritchie | Republican | 21st | March 4, 1857 – March 4, 1859 | |
| Donald L. Ritter | Republican | 15th | January 3, 1979 – January 3, 1993 | |
| John Ritter | Democratic | 9th | March 4, 1843 – March 4, 1847 | |
| Edward E Robbins | Republican | 21st | March 4, 1897 – March 4, 1899 | |
| Edward E Robbins | Republican | 22nd | March 4, 1917 – January 25, 1919 | Died. |
| John Robbins | Democratic | 4th | March 4, 1849 – March 4, 1853 | |
| John Robbins | Democratic | 3rd | March 4, 1853 – March 4, 1855 | |
| John Robbins | Democratic | 5th | March 4, 1875 – March 4, 1877 | |
| Anthony E Roberts | Know Nothing | 9th | March 4, 1855 – March 4, 1857 | |
| Anthony E Roberts | Republican | 9th | March 4, 1857 – March 4, 1859 | |
| Jonathan Roberts | Democratic-Republican | 2nd | March 4, 1811 – February 24, 1814 | Resigned after being elected to the US Senate. |
| John B. Robinson | Republican | 6th | March 4, 1891 – March 4, 1897 | |
| David F. Robison | Opposition | 17th | March 4, 1855 – March 4, 1857 | |
| Robert L. Rodgers | Republican | 29th | January 3, 1939 – January 3, 1945 | |
| Robert L. Rodgers | Republican | 28th | January 3, 1945 – January 3, 1947 | |
| William Rodman | Democratic-Republican | 2nd | March 4, 1811 – March 4, 1813 | |
| Thomas J Rogers | Democratic-Republican | 6th | March 3, 1818 – March 4, 1823 | |
| Thomas J Rogers | Democratic-Republican | 8th | March 4, 1823 – April 20, 1824 | Resigned. |
| Fred B. Rooney | Democratic | 15th | July 30, 1963 – January 3, 1979 | |
| John M. Rose | Republican | 19th | March 4, 1917 – March 4, 1923 | |
| John Ross | Democratic-Republican | 2nd | March 4, 1809 – March 4, 1811 | |
| John Ross | Democratic-Republican | 6th | March 4, 1815 – February 24, 1818 | Resigned to become president judge of the seventh judicial district of Pennsylvania. |
| Sobieski Ross | Republican | 18th | March 4, 1873 – March 4, 1875 | |
| Sobieski Ross | Republican | 16th | March 4, 1875 – March 4, 1877 | |
| Thomas Ross | Democratic | 6th | March 4, 1849 – March 4, 1853 | |
| John H. Rothermel | Democratic | 13th | March 4, 1907 – March 4, 1915 | |
| Keith Rothfus | Republican | 12th | January 3, 2013 – January 3, 2019 | Lost re-election. |
| Charles H. Rowland | Republican | 21st | March 4, 1915 – March 4, 1919 | |
| Arthur R. Rupley | Republican | At-large | March 4, 1913 – March 4, 1915 | |
| James M. Russell | Whig | 18th | December 21, 1841 – March 4, 1843 | |
| Samuel L. Russell | Whig | 17th | March 4, 1853 – March 4, 1855 | |
| Albert G. Rutherford | Republican | 15th | January 3, 1937 – August 10, 1941 | Died. |
| James W. Ryan | Democratic | 13th | March 4, 1899 – March 4, 1901 | |
| John W. Ryon | Democratic | 13th | March 4, 1879 – March 4, 1881 | |
| Leon Sacks | Democratic | 1st | January 3, 1937 – January 3, 1943 | |
| Edmund W. Samuel | Republican | 16th | March 4, 1905 – March 4, 1907 | |
| Rick Santorum | Republican | 18th | January 3, 1991 – January 3, 1995 | |
| George W. Sarbacher Jr. | Republican | 5th | January 3, 1947 – January 3, 1949 | |
| Benjamin Say | Democratic-Republican | 1st | November 16, 1808 – June 1809 | Resigned. |
| John P. Saylor | Republican | 26th | September 13, 1949 – January 3, 1953 | |
| John P. Saylor | Republican | 22nd | January 3, 1953 – January 3, 1973 | |
| John P. Saylor | Republican | 12th | January 3, 1973 – October 28, 1973 | |
| Mary Gay Scanlon | Democratic | 7th | November 6, 2018 – January 3, 2019 | Redistricted. |
| Mary Gay Scanlon | Democratic | 5th | January 3, 2019 – present | Incumbent |
| Thomas E. Scanlon | Democratic | 30th | January 3, 1941 – January 3, 1943 | |
| Thomas E. Scanlon | Democratic | 16th | January 3, 1943 – January 3, 1945 | |
| Gustav A. Schneebeli | Republican | 26th | March 4, 1905 – March 4, 1907 | |
| Herman T. Schneebeli | Republican | 17th | April 26, 1960 – January 3, 1977 | |
| Dick Schulze | Republican | 5th | January 3, 1975 – January 3, 1993 | |
| Allyson Schwartz | Democratic | 13th | January 3, 2005 – January 3, 2015 | Retired. |
| John Schwartz | Democratic | 8th | March 4, 1859 – June 20, 1860 | Died. |
| Richard S. Schweiker | Republican | 13th | January 3, 1961 – January 3, 1969 | |
| James P. Scoblick | Republican | 10th | November 5, 1946 – January 3, 1949 | |
| Glenni William Scofield | Republican | 19th | March 4, 1863 – March 4, 1873 | |
| Glenni William Scofield | Republican | At-large | March 4, 1873 – March 4, 1875 | |
| Hardie Scott | Republican | 3rd | January 3, 1947 – January 3, 1953 | |
| Hugh Scott | Republican | 7th | January 3, 1941 – January 3, 1945 | Lost re-election. |
| Hugh Scott | Republican | 6th | January 3, 1947 – January 3, 1959 | Retired to run for United States Senator. |
| John R. K. Scott | Republican | At-large | March 4, 1915 – January 5, 1919 | Resigned. |
| John Scott | Jacksonian | 12th | March 4, 1829 – March 4, 1831 | |
| Thomas Scott | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| Thomas Scott | Pro-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| William Lawrence Scott | Democratic | 27th | March 4, 1885 – March 4, 1889 | |
| George W. Scranton | Republican | 12th | March 4, 1859 – March 24, 1861 | Died. |
| Joseph A. Scranton | Republican | 12th | March 4, 1881 – March 4, 1883 | |
| Joseph A. Scranton | Republican | 12th | March 4, 1885 – March 4, 1887 | |
| Joseph A. Scranton | Republican | 11th | March 4, 1889 – March 4, 1891 | |
| Joseph A. Scranton | Republican | 11th | March 4, 1893 – March 4, 1897 | |
| William Scranton | Republican | 10th | January 3, 1961 – January 3, 1963 | |
| Edward Scull | Republican | 17th | March 4, 1887 – March 4, 1889 | |
| Edward Scull | Republican | 20th | March 4, 1889 – March 4, 1893 | |
| John Sergeant | Federalist | 1st | October 10, 1815 – March 4, 1823 | |
| John Sergeant | Anti-Jacksonian | 2nd | March 4, 1827 – March 4, 1829 | |
| John Sergeant | Whig | 2nd | March 4, 1835 – September 15, 1841 | Resigned. |
| Joe Sestak | Democratic | 7th | January 3, 2007 – January 3, 2011 | Retired. |
| Adam Seybert | Democratic-Republican | 1st | October 10, 1809 – March 4, 1815 | |
| Adam Seybert | Democratic-Republican | 1st | March 4, 1817 – March 4, 1819 | |
| William S. Shallenberger | Republican | 24th | March 4, 1877 – March 4, 1883 | |
| James Sheakley | Democratic | 26th | March 4, 1875 – March 4, 1877 | |
| Daniel Sheffer | Democratic | 12th | March 4, 1837 – March 4, 1839 | |
| John E. Sheridan | Democratic | 4th | November 7, 1939 – January 3, 1947 | |
| Don Sherwood | Republican | 10th | January 3, 1999 – January 3, 2007 | |
| Henry Sherwood | Democratic | 18th | March 4, 1871 – March 4, 1873 | |
| George Shiras III | Independent Republican | 29th | March 4, 1903 – March 4, 1905 | |
| Lazarus D. Shoemaker | Republican | 12th | March 4, 1871 – March 4, 1875 | |
| George W. Shonk | Republican | 12th | March 4, 1891 – March 4, 1893 | |
| Joseph B. Showalter | Republican | 25th | April 20, 1897 – March 4, 1903 | |
| Milton W Shreve | Republican | 25th | March 4, 1913 – March 4, 1915 | |
| Milton W Shreve | Republican | 25th | March 4, 1919 – March 4, 1921 | |
| Milton W Shreve | Independent Republican | 25th | March 4, 1921 – March 4, 1923 | |
| Milton W Shreve | Republican | 29th | March 4, 1923 – March 4, 1933 | |
| Joseph H. Shull | Democratic | 26th | March 4, 1903 – March 4, 1905 | |
| Elmer "Bud" Shuster | Republican | 9th | January 3, 1973 – February 3, 2001 | Resigned. |
| William "Bill" Shuster | Republican | 9th | May 15, 2001 – January 3, 2019 | Retired. |
| Joseph C. Sibley | Democratic | 26th | March 4, 1893 – March 4, 1895 | |
| Joseph C. Sibley | Democratic | 27th | March 4, 1899 – March 4, 1901 | |
| Joseph C. Sibley | Republican | 27th | March 4, 1901 – March 4, 1903 | |
| Joseph C. Sibley | Republican | 28th | March 4, 1903 – March 4, 1907 | |
| Thomas H Sill | Anti-Jacksonian | 18th | January 13, 1826 – March 4, 1827 | |
| Thomas H Sill | Anti-Jacksonian | 18th | March 4, 1829 – March 4, 1831 | |
| William Simonton | Whig | 10th | March 4, 1839 – March 4, 1843 | |
| Richard M. Simpson | Republican | 18th | May 11, 1937 – January 3, 1945 | Died. |
| Richard M. Simpson | Republican | 17th | January 3, 1945 – January 3, 1953 | Died. |
| Richard M. Simpson | Republican | 18th | January 3, 1953 – January 7, 1960 | Died. |
| William A. Sipe | Democratic | 24th | December 5, 1892 – March 4, 1895 | |
| Frank C. Sites | Democratic | 19th | March 4, 1923 – March 4, 1925 | |
| Samuel Sitgreaves | Federalist | 4th | March 4, 1795 – ????, 1798 | Resigned. |
| Edward L. Sittler Jr. | Republican | 23rd | January 3, 1951 – January 3, 1953 | |
| Amos Slaymaker | Federalist | 3rd | October 11, 1814 – March 4, 1815 | |
| John Smilie | Anti-Administration | At-large | March 4, 1793 – March 4, 1795 | |
| John Smilie | Anti-Administration | 11th | March 4, 1799 – March 4, 1803 | |
| John Smilie | Anti-Administration | 9th | March 4, 1803 – December 30, 1812 | Died. |
| A. Herr Smith | Republican | 9th | March 4, 1873 – March 4, 1885 | |
| Francis R. Smith | Democratic | 5th | January 3, 1941 – January 3, 1943 | |
| George Smith | Democratic-Republican | 5th | March 4, 1809 – March 4, 1813 | |
| Isaac Smith | Democratic-Republican | 10th | March 4, 1813 – March 4, 1815 | |
| John T. Smith | Democratic | 3rd | March 4, 1843 – March 4, 1845 | |
| Joseph F. Smith | Democratic | 3rd | July 21, 1981 – January 3, 1983 | |
| Samuel A. Smith | Jacksonian | 8th | October 13, 1829 – March 4, 1833 | |
| Samuel Smith | Democratic-Republican | 11th | November 7, 1805 – March 4, 1811 | |
| Thomas Smith | Federalist | 1st | March 4, 1815 – March 4, 1817 | |
| William O. Smith | Republican | 27th | March 4, 1903 – March 4, 1907 | |
| Lloyd Smucker | Republican | 16th | January 3, 2017 – January 3, 2019 | Redistricted. |
| Lloyd Smucker | Republican | 11th | January 3, 2019 – present | Incumbent |
| J. Buell Snyder | Democratic | 24th | March 4, 1933 – January 3, 1945 | Died. |
| J. Buell Snyder | Democratic | 23rd | January 3, 1945 – February 24, 1946 | Died. |
| John Snyder | Democratic | 16th | March 4, 1841 – March 4, 1843 | |
| William H. Sowden | Democratic | 10th | March 4, 1885 – March 4, 1889 | |
| Jacob Spangler | Democratic-Republican | 4th | March 4, 1817 – April 20, 1818 | Resigned to become Surveyor-General of Pennsylvania. |
| Peter M. Speer | Republican | 28th | March 4, 1911 – March 4, 1913 | |
| Robert M. Speer | Democratic | 17th | March 4, 1871 – March 4, 1875 | |
| Michael J. Stack | Democratic | 6th | January 3, 1935 – January 3, 1939 | |
| James A. Stahle | Republican | 19th | March 4, 1895 – March 4, 1897 | |
| William H. Stanton | Democratic | 12th | November 7, 1876 – March 4, 1877 | |
| S. Walter Stauffer | Republican | 19th | January 3, 1953 – January 3, 1955 | |
| S. Walter Stauffer | Republican | 19th | January 3, 1957 – January 3, 1959 | |
| Henry J. Steele | Democratic | 26th | March 4, 1915 – March 4, 1921 | |
| William Stenger | Democratic | 18th | March 4, 1875 – March 4, 1879 | |
| Philander Stephens | Jacksonian | 9th | March 4, 1829 – March 4, 1833 | |
| John B. Sterigere | Jacksonian | 5th | March 4, 1827 – March 4, 1831 | |
| Bruce F. Sterling | Democratic | 23rd | March 4, 1917 – March 4, 1919 | |
| Thaddeus Stevens | Whig | 8th | March 4, 1849 – March 4, 1853 | |
| Thaddeus Stevens | Republican | 9th | March 4, 1859 – August 11, 1868 | Died. |
| James S. Stevenson | Jacksonian | 16th | March 4, 1825 – March 4, 1829 | |
| Andrew Stewart | Democratic-Republican | 13th | March 4, 1821 – March 4, 1823 | |
| Andrew Stewart | Democratic-Republican | 14th | March 4, 1823 – March 4, 1825 | |
| Andrew Stewart | Jacksonian | 14th | March 4, 1825 – March 4, 1827 | |
| Andrew Stewart | Anti-Jacksonian | 14th | March 4, 1827 – March 4, 1829 | |
| Andrew Stewart | Anti-Masonic | 14th | March 4, 1831 – March 4, 1833 | |
| Andrew Stewart | Anti-Masonic | 20th | March 4, 1833 – March 4, 1835 | |
| Andrew Stewart | Whig | 18th | March 4, 1843 – March 4, 1849 | |
| Andrew Stewart | Republican | 24th | March 4, 1891 – February 26, 1892 | Lost contested election |
| John Stewart | Democratic-Republican | 8th | January 15, 1801 – March 4, 1803 | |
| John Stewart | Democratic-Republican | 6th | March 4, 1803 – March 4, 1805 | |
| William Stewart | Republican | 23rd | March 4, 1857 – March 4, 1861 | |
| John D Stiles | Democratic | 7th | June 3, 1862 – March 4, 1863 | |
| John D Stiles | Democratic | 6th | March 4, 1863 – March 4, 1865 | |
| John D Stiles | Democratic | 6th | March 4, 1869 – March 4, 1871 | |
| Edward L. Stokes | Republican | 2nd | November 3, 1931 – March 4, 1933 | |
| Edward L. Stokes | Republican | 6th | March 4, 1933 – January 3, 1935 | |
| Charles W. Stone | Republican | 27th | November 4, 1890 – March 4, 1899 | |
| William A. Stone | Republican | 23rd | March 4, 1891 – November 8, 1898 | Resigned to become Governor of Pennsylvania. |
| John B Storm | Democratic | 11th | March 4, 1871 – March 4, 1875 | |
| John B Storm | Democratic | 11th | March 4, 1883 – March 4, 1887 | |
| Christian M. Straub | Democratic | 11th | March 4, 1853 – March 4, 1855 | |
| James D. Strawbridge | Republican | 13th | March 4, 1873 – March 4, 1875 | |
| John Strohm | Whig | 8th | March 4, 1845 – March 4, 1849 | |
| Nathan L. Strong | Republican | 27th | March 4, 1917 – January 3, 1935 | |
| William Strong | Democratic | 9th | March 4, 1847 – March 4, 1851 | |
| Myer Strouse | Democratic | 10th | March 4, 1863 – March 4, 1867 | |
| Howard W. Stull | Republican | 20th | April 26, 1932 – March 4, 1933 | |
| John C. Sturtevant | Republican | 26th | March 4, 1897 – March 4, 1899 | |
| Patrick J. Sullivan | Republican | 34th | March 4, 1929 – March 4, 1933 | |
| Joel B. Sutherland | Jacksonian | 1st | March 4, 1827 – March 4, 1837 | |
| John Swanwick | Democratic-Republican | 1st | March 4, 1795 – August 1, 1798 | Died. |
| Joshua W. Swartz | Republican | 19th | March 4, 1925 – March 4, 1927 | |
| J. Howard Swick | Republican | 26th | March 4, 1927 – January 3, 1935 | |
| William I. Swoope | Republican | 23rd | March 4, 1923 – March 4, 1927 | |
| Guy J. Swope | Democratic | 19th | January 3, 1937 – January 3, 1939 | |
| John A Swope | Democratic | 19th | December 23, 1884 – March 4, 1885 | |
| John A Swope | Democratic | 19th | November 3, 1885 – March 4, 1887 | |
| Adamson Tannehill | Democratic-Republican | 14th | March 4, 1813 – March 4, 1815 | |
| Christian Tarr | Democratic-Republican | 13th | March 4, 1817 – March 4, 1821 | |
| Alexander W. Taylor | Republican | 21st | March 4, 1873 – March 4, 1875 | |
| Caleb N Taylor | Republican | 5th | March 4, 1867 – March 4, 1869 | |
| Caleb N Taylor | Republican | 5th | April 13, 1870 – March 4, 1871 | Successfully contested the election of John R. Reading. |
| Henry W Temple | Progressive | 24th | March 4, 1913 – March 4, 1915 | |
| Henry W Temple | Republican | 24th | November 2, 1915 – March 4, 1923 | Elected to finish the term of Representative-elect William M. Brown. |
| Henry W Temple | Republican | 25th | March 4, 1923 – March 4, 1933 | Elected to finish the term of Representative-elect William M. Brown. |
| Thomas W. Templeton | Republican | 11th | March 4, 1917 – March 4, 1919 | |
| John K. Tener | Republican | 24th | March 4, 1909 – January 16, 1911 | Resigned to become Governor of Pennsylvania. |
| Martin R. Thayer | Republican | 5th | March 4, 1863 – March 4, 1867 | |
| Richard Thomas | Federalist | 3rd | March 4, 1795 – March 4, 1801 | |
| Glenn G. T. Thompson | Republican | 5th | January 3, 2009 – January 3, 2019 | Redistricted. |
| Glenn G. T. Thompson | Republican | 15th | January 3, 2019 – present | Incumbent |
| James Thompson | Democratic | 23rd | March 4, 1845 – March 4, 1851 | |
| John M. Thompson | Republican | 23rd | ???? – March 4, 1875 | |
| John M. Thompson | Republican | 26th | March 4, 1877 – March 4, 1879 | |
| Alexander Thomson | Democratic-Republican | 13th | December 6, 1824 – March 4, 1825 | Resigned. |
| Alexander Thomson | Jacksonian | 13th | March 4, 1825 – May 1, 1826 | Resigned. |
| Joseph E. Thropp | Republican | 20th | March 4, 1899 – March 4, 1901 | |
| Harve Tibbott | Republican | 27th | January 3, 1939 – January 3, 1945 | |
| Harve Tibbott | Republican | 26th | January 3, 1945 – January 3, 1949 | |
| John Tod | Democratic-Republican | 8th | March 4, 1821 – March 4, 1823 | Resigned after becoming judge of the Court of Common Pleas for the 16th judicial district. |
| John Tod | Democratic-Republican | 13th | March 4, 1823 – ????, 1824 | Resigned after becoming judge of the Court of Common Pleas for the 16th judicial district. |
| Lemuel Todd | Opposition | 16th | March 4, 1855 – March 4, 1857 | |
| Lemuel Todd | Republican | At-large | March 4, 1873 – March 4, 1875 | |
| George W. Toland | Whig | 2nd | March 4, 1837 – March 4, 1843 | |
| Herman Toll | Democratic | 6th | January 3, 1959 – January 3, 1963 | |
| Herman Toll | Democratic | 4th | January 3, 1963 – January 3, 1967 | |
| Pat Toomey | Republican | 15th | January 3, 1999 – January 3, 2005 | Retired to run for United States Senator. |
| Charles C. Townsend | Republican | 25th | March 4, 1889 – March 4, 1891 | |
| Washington Townsend | Republican | 7th | March 4, 1869 – March 4, 1875 | |
| Washington Townsend | Republican | 6th | March 4, 1875 – March 4, 1877 | |
| Henry W. Tracy | Independent Republican | 13th | March 4, 1863 – March 4, 1865 | |
| Michael C. Trout | Democratic | 23rd | March 4, 1853 – March 4, 1855 | |
| William I. Troutman | Republican | At-large | January 3, 1943 – January 2, 1945 | Resigned to become member of Pennsylvania State Senate. |
| Jacob Turney | Democratic | 21st | March 4, 1875 – March 4, 1879 | |
| C. Murray Turpin | Republican | 12th | June 24, 1929 – January 3, 1937 | |
| Job R. Tyson | Whig | 2nd | March 4, 1855 – March 4, 1857 | |
| Daniel Udree | Democratic-Republican | 7th | October 12, 1813 – March 4, 1815 | |
| Daniel Udree | Democratic-Republican | 7th | December 26, 1820 – March 4, 1821 | |
| Daniel Udree | Democratic-Republican | 7th | December 10, 1822 – March 4, 1825 | |
| Daniel M. Van Auken | Democratic | 11th | March 4, 1867 – March 4, 1871 | |
| Espy Van Horne | Jacksonian | 9th | March 4, 1825 – March 4, 1829 | |
| Isaac Van Horne | Democratic-Republican | 4th | March 4, 1801 – March 4, 1803 | |
| Isaac Van Horne | Democratic-Republican | 2nd | March 4, 1803 – March 4, 1805 | |
| James E. Van Zandt | Republican | 23rd | January 3, 1939 – September 24, 1943 | Resigned to join the United States Navy. |
| James E. Van Zandt | Republican | 22nd | January 3, 1947 – January 3, 1953 | |
| James E. Van Zandt | Republican | 20th | January 3, 1953 – January 3, 1963 | |
| William S. Vare | Republican | 1st | May 24, 1912 – March 4, 1927 | |
| Albert C. Vaughn | Republican | 8th | January 3, 1951 – September 1, 1951 | Died. |
| Richard Vaux | Democratic | 3rd | May 20, 1890 – March 4, 1891 | |
| John P. Verree | Republican | 3rd | March 4, 1859 – March 4, 1863 | |
| Joseph P. Vigorito | Democratic | 24th | January 3, 1965 – January 3, 1977 | |
| David D Wagener | Jacksonian | 7th | March 4, 1833 – March 4, 1837 | |
| David D Wagener | Democratic | 7th | March 4, 1837 – March 4, 1841 | |
| Alfred M. Waldron | Republican | 3rd | March 4, 1933 – January 3, 1935 | |
| Doug Walgren | Democratic | 18th | January 3, 1977 – January 3, 1991 | |
| Robert J. C. Walker | Republican | 16th | March 4, 1881 – March 4, 1883 | |
| Robert S. Walker | Republican | 16th | January 3, 1977 – January 3, 1997 | |
| James M. Wallace | Democratic-Republican | 3rd | October 10, 1815 – March 4, 1821 | First elected to finish Representative-elect Amos Ellmaker's term. |
| John W Wallace | Republican | 23rd | March 4, 1861 – March 4, 1863 | |
| John W Wallace | Republican | 24th | March 4, 1875 – March 4, 1877 | |
| Robert Waln | Federalist | 1st | December 3, 1798 – March 4, 1801 | |
| Francis E. Walter | Democratic | 21st | March 4, 1933 – January 3, 1945 | Died. |
| Francis E. Walter | Democratic | 20th | January 3, 1945 – January 3, 1953 | Died. |
| Francis E. Walter | Democratic | 15th | January 3, 1953 – May 31, 1963 | Died. |
| Anderson H Walters | Republican | At-large | March 4, 1913 – March 4, 1915 | |
| Anderson H Walters | Republican | At-large | March 4, 1919 – March 4, 1923 | |
| Anderson H Walters | Republican | 20th | March 4, 1925 – March 4, 1927 | |
| Irving P Wanger | Republican | 7th | March 4, 1893 – March 4, 1903 | Lost re-election. |
| Irving P Wanger | Republican | 8th | March 4, 1903 – March 4, 1911 | Lost re-election. |
| William Ward | Republican | 6th | March 4, 1877 – March 4, 1883 | |
| John H. Ware III | Republican | 5th | March 4, 1973 – January 3, 1975 | |
| George Watkins | Republican | 7th | January 3, 1965 – January 3, 1967 | Died. |
| George Watkins | Republican | 9th | January 3, 1967 – August 7, 1970 | Died. |
| John G. Watmough | Anti-Jacksonian | 3rd | March 4, 1831 – March 4, 1835 | |
| Laurence H. Watres | Republican | 11th | March 4, 1923 – March 4, 1931 | |
| Henry W Watson | Republican | 8th | March 4, 1915 – March 4, 1923 | Died. |
| Henry W Watson | Republican | 9th | March 4, 1923 – August 27, 1933 | Died. |
| Lewis F Watson | Republican | 27th | March 4, 1877 – March 4, 1879 | |
| Lewis F Watson | Republican | 27th | March 4, 1881 – March 4, 1883 | |
| Lewis F Watson | Republican | 27th | March 4, 1889 – August 25, 1890 | Died. |
| Isaac Wayne | Federalist | 4th | March 4, 1823 – March 4, 1825 | |
| James D. Weaver | Republican | 24th | January 3, 1963 – January 3, 1965 | |
| Samuel A. Weiss | Democratic | 31st | January 3, 1941 – January 3, 1943 | Resigned to become judge of court of common pleas of Allegheny County |
| Samuel A. Weiss | Democratic | 30th | January 3, 1943 – January 3, 1945 | Resigned to become judge of court of common pleas of Allegheny County |
| Samuel A. Weiss | Democratic | 33rd | January 3, 1945 – January 7, 1946 | Resigned to become judge of court of common pleas of Allegheny County |
| Curt Weldon | Republican | 7th | January 3, 1987 – January 3, 2007 | |
| George A. Welsh | Republican | 6th | March 4, 1923 – May 31, 1932 | Resigned to become a district court judge. |
| George M. Wertz | Republican | 20th | March 4, 1923 – March 4, 1925 | |
| John Westbrook | Democratic | 7th | March 4, 1841 – March 4, 1843 | |
| J. Irving Whalley | Republican | 18th | November 8, 1960 – January 3, 1963 | |
| J. Irving Whalley | Republican | 12th | January 3, 1963 – January 3, 1973 | |
| Nelson P. Wheeler | Republican | 28th | March 4, 1907 – March 4, 1911 | |
| Alexander C. White | Republican | 25th | March 4, 1885 – March 4, 1887 | |
| Allison White | Democratic | 15th | March 4, 1857 – March 4, 1859 | |
| Harry White | Republican | 25th | March 4, 1877 – March 4, 1881 | |
| James Whitehill | Democratic-Republican | 3rd | March 4, 1813 – September 1, 1814 | Resigned. |
| John Whitehill | Democratic-Republican | 3rd | March 4, 1803 – March 4, 1807 | |
| Robert Whitehill | Democratic-Republican | 4th | November 7, 1805 – March 4, 1813 | Died. |
| Robert Whitehill | Democratic-Republican | 5th | March 4, 1813 – April 8, 1813 | Died. |
| John Whiteside | Democratic-Republican | 3rd | March 4, 1815 – March 4, 1819 | |
| David Wilmot | Democratic | 12th | March 4, 1845 – March 4, 1851 | |
| Susan Wild | Democratic | 15th | November 6, 2018 – January 3, 2019 | Redistricted. |
| Susan Wild | Democratic | 7th | January 3, 2019 – January 3, 2025 | Lost re-election |
| Jonathan Williams | Democratic-Republican | 1st | March 4, 1815 – May 16, 1815 | Died. |
| Lawrence G. Williams | Republican | 7th | January 3, 1967 – January 3, 1975 | |
| Morgan B. Williams | Republican | 12th | March 4, 1897 – March 4, 1899 | |
| Thomas Williams | Republican | 23rd | March 4, 1863 – March 4, 1869 | |
| Henry Wilson | Democratic-Republican | 7th | March 4, 1823 – March 4, 1825 | |
| Henry Wilson | Jacksonian | 7th | March 4, 1825 – August 24, 1826 | Died. |
| James Wilson | Democratic-Republican | 11th | March 4, 1823 – March 4, 1825 | |
| James Wilson | Jacksonian | 11th | March 4, 1825 – March 4, 1829 | |
| John H. Wilson | Democratic | 22nd | March 4, 1919 – March 4, 1921 | |
| Stephen F. Wilson | Republican | 18th | March 4, 1865 – March 4, 1869 | |
| Thomas Wilson | Democratic-Republican | 15th | May 14, 1813 – March 4, 1817 | |
| William Wilson | Democratic-Republican | 10th | March 4, 1815 – March 4, 1819 | |
| William B. Wilson | Democratic | 15th | March 4, 1907 – March 4, 1913 | |
| William H. Wilson | Republican | 2nd | January 3, 1935 – January 3, 1937 | |
| Morgan R. Wise | Democratic | 21st | March 4, 1879 – March 4, 1883 | |
| William H. Witte | Democratic | 4th | March 4, 1853 – March 4, 1855 | |
| George Wolf | Democratic-Republican | 8th | December 9, 1824 – March 4, 1825 | |
| George Wolf | Jacksonian | 8th | March 4, 1825 – ????, 1829 | Resigned before the convening of the 21st Congress. |
| James Wolfenden | Republican | 8th | November 6, 1928 – January 3, 1945 | |
| James Wolfenden | Republican | 7th | January 3, 1945 – January 3, 1947 | |
| Simon P. Wolverton | Democratic | 17th | March 4, 1891 – March 4, 1895 | |
| Alan Wood Jr. | Republican | 7th | March 4, 1875 – March 4, 1877 | |
| John Wood | Republican | 5th | March 4, 1859 – March 4, 1861 | |
| Henry Woods | Federalist | 10th | March 4, 1799 – March 4, 1803 | |
| John Woods | Federalist | 14th | March 4, 1815 – March 4, 1817 | |
| George W. Woodward | Democratic | 12th | November 21, 1867 – March 4, 1871 | |
| Ephraim M. Woomer | Republican | 14th | March 4, 1893 – March 4, 1897 | |
| Ludwig Worman | Federalist | 7th | March 4, 1821 – October 17, 1822 | Died. |
| Charles F Wright | Republican | 15th | March 4, 1899 – March 4, 1903 | |
| Charles F Wright | Republican | 14th | March 4, 1903 – March 4, 1905 | |
| Hendrick B Wright | Democratic | 12th | March 4, 1853 – March 4, 1855 | |
| Hendrick B Wright | Democratic | 12th | July 4, 1861 – March 4, 1863 | |
| Hendrick B Wright | Democratic | 12th | March 4, 1877 – March 4, 1879 | |
| Hendrick B Wright | Greenback | 12th | March 4, 1879 – March 4, 1881 | |
| James A. Wright | Democratic | 34th | January 3, 1941 – January 3, 1943 | |
| James A. Wright | Democratic | 32nd | January 3, 1943 – January 3, 1945 | |
| Myron B. Wright | Republican | 15th | March 4, 1889 – November 13, 1894 | Died. |
| John Wurts | Jacksonian | 1st | March 4, 1825 – March 4, 1827 | |
| Adam M. Wyant | Republican | 22nd | March 4, 1921 – March 4, 1923 | |
| Adam M. Wyant | Republican | 31st | March 4, 1923 – March 4, 1933 | |
| Henry Wynkoop | Pro-Administration | At-large | March 4, 1789 – March 4, 1791 | |
| Robert M. Yardley | Republican | 7th | March 4, 1887 – March 4, 1891 | |
| Gus Yatron | Democratic | 6th | January 3, 1969 – January 3, 1993 | |
| Seth H. Yocum | Greenback | 20th | March 4, 1825 – March 4, 1827 | |
| Jacob S. Yost | Democratic | 5th | March 4, 1843 – March 4, 1847 | |
| James R. Young | Republican | 4th | March 4, 1897 – March 4, 1903 | |
| Edward D. Ziegler | Democratic | 19th | March 4, 1899 – March 4, 1901 | unsuccessful candidate for renomination |