# List of former members of the United States House of Representatives (D)

This is a complete list of former members of the United States House of Representatives whose last names begin with the letter D.

## Number of years/terms representative/delegate has served

The number of years the representative/delegate has served in Congress indicates the number of terms the representative/delegate has. Note the representative/delegate can also serve non-consecutive terms if the representative/delegate loses election and wins re-election to the House.
* 2 years - 1 or 2 terms
* 4 years - 2 or 3 terms
* 6 years - 3 or 4 terms
* 8 years - 4 or 5 terms
* 10 years - 5 or 6 terms
* 12 years - 6 or 7 terms
* 14 years - 7 or 8 terms
* 16 years - 8 or 9 terms
* 18 years - 9 or 10 terms
* 20 years - 10 or 11 terms
* 22 years - 11 or 12 terms
* 24 years - 12 or 13 terms
* 26 years - 13 or 14 terms
* 28 years - 14 or 15 terms
* 30 years - 15 or 16 terms
* 32 years - 16 or 17 terms
* 34 years - 17 or 18 terms
* 36 years - 18 or 19 terms
* 38 years - 19 or 20 terms
* 40 years - 20 or 21 terms
* 42 years - 21 or 22 terms
* 44 years - 22 or 23 terms
* 46 years - 23 or 24 terms
* 48 years - 24 or 25 terms
* 50 years - 25 or 26 terms
* 52 years - 26 or 27 terms
* 54 years - 27 or 28 terms
* 56 years - 28 or 29 terms
* 58 years - 29 or 30 terms
| Representative/Delegate | Years | State/Territory | Party | Lifespan |
| Thomas D'Alesandro Jr. | 1939–1947 | Maryland | Democratic | 1903–1987 |
| Norman D'Amours | 1975–1985 | New Hampshire | Democratic | 1937–present |
| Anthony D'Esposito | 2023–2025 | New York | Republican | 1982–present |
| Wesley A. D'Ewart | 1945–1955 | Montana | Republican | 1889–1973 |
| Emilio Daddario | 1959–1971 | Connecticut | Democratic | 1918–2010 |
| Rollin M. Daggett | 1879–1881 | Nevada | Republican | 1831–1901 |
| Paul B. Dague | 1947–1966 | Pennsylvania | Republican | 1898–1974 |
| Herman B. Dahle | 1899–1903 | Wisconsin | Republican | 1855–1920 |
| Kathy Dahlkemper | 2009–2011 | Pennsylvania | Democratic | 1957–present |
| Samuel Gordon Daily | 1860–1865 | Nebraska | Republican | 1823–1866 |
| Steve Daines | 2013–2015 | Montana | Republican | 1962–present |
| Harry H. Dale | 1913–1919 | New York | Democratic | 1868–1935 |
| Porter H. Dale | 1915–1923 | Vermont | Republican | 1867–1933 |
| Thomas H. Dale | 1905–1907 | Pennsylvania | Republican | 1846–1912 |
| Frederick W. Dallinger | 1915–1925 1926–1932 | Massachusetts | Republican | 1871–1955 |
| J. Burrwood Daly | 1935–1939 | Pennsylvania | Democratic | 1872–1939 |
| William D. Daly | 1899–1900 | New Jersey | Democratic | 1851–1900 |
| John Dalzell | 1887–1913 | Pennsylvania | Republican | 1845–1927 |
| William S. Damrell | 1855–1857 | Massachusetts | American | 1809–1860 |
| William S. Damrell | 1857–1859 | Massachusetts | Republican | 1809–1860 |
| Amasa Dana | 1839–1841 1843–1845 | New York | Democratic | 1792–1867 |
| Samuel Dana | 1814–1815 | Massachusetts | Democratic-Republican | 1767–1835 |
| Samuel W. Dana | 1797–1810 | Connecticut | Federalist | 1760–1830 |
| Joseph Dane | 1820–1823 | Maine | Federalist | 1778–1858 |
| Lorenzo Danford | 1873–1879 1895–1899 | Ohio | Republican | 1829–1899 |
| Henry G. Danforth | 1911–1917 | New York | Republican | 1854–1918 |
| Dan Daniel | 1969–1988 | Virginia | Democratic | 1914–1988 |
| Henry Daniel | 1827–1833 | Kentucky | Democratic | 1786–1873 |
| John Reeves Jones Daniel | 1841–1853 | North Carolina | Democratic | 1802–1868 |
| John W. Daniel | 1885–1887 | Virginia | Democratic | 1842–1910 |
| Robert Daniel | 1973–1983 | Virginia | Republican | 1936–2012 |
| Warren F. Daniell | 1891–1893 | New Hampshire | Democratic | 1826–1913 |
| Charles Daniels | 1893–1897 | New York | Republican | 1825–1897 |
| Dominick V. Daniels | 1959–1977 | New Jersey | Democratic | 1908–1987 |
| Milton J. Daniels | 1903–1905 | California | Republican | 1838–1914 |
| George E. Danielson | 1971–1982 | California | Democratic | 1915–1998 |
| William Dannemeyer | 1979–1993 | California | Republican | 1929–2019 |
| Joel Buchanan Danner | 1850–1851 | Pennsylvania | Democratic | 1804–1885 |
| Pat Danner | 1993–2001 | Missouri | Democratic | 1934–present |
| Ezra Darby | 1805–1808 | New Jersey | Democratic-Republican | 1768–1808 |
| John Fletcher Darby | 1851–1853 | Missouri | Whig | 1803–1882 |
| Colgate Darden | 1933–1937 1939–1941 | Virginia | Democratic | 1897–1981 |
| Buddy Darden | 1983–1995 | Georgia | Democratic | 1943–present |
| Edmund S. Dargan | 1845–1847 | Alabama | Democratic | 1805–1879 |
| George W. Dargan | 1883–1891 | South Carolina | Democratic | 1841–1898 |
| Mason C. Darling | 1848–1849 | Wisconsin | Democratic | 1801–1866 |
| William Augustus Darling | 1865–1867 | New York | Republican | 1817–1895 |
| Edward Darlington | 1833–1839 | Pennsylvania | Anti-Masonic | 1795–1884 |
| Isaac Darlington | 1817–1819 | Pennsylvania | Federalist | 1781–1839 |
| Smedley Darlington | 1887–1891 | Pennsylvania | Republican | 1827–1899 |
| William Darlington | 1815–1817 1819–1823 | Pennsylvania | Democratic-Republican | 1782–1863 |
| Archibald B. Darragh | 1901–1909 | Michigan | Republican | 1840–1927 |
| Cornelius Darragh | 1844–1847 | Pennsylvania | Whig | 1809–1854 |
| Chester Bidwell Darrall | 1869–1878 1881–1883 | Louisiana | Republican | 1842–1908 |
| George P. Darrow | 1915–1937 1939–1941 | Pennsylvania | Republican | 1859–1943 |
| Tom Daschle | 1979–1987 | South Dakota | Democratic | 1947–present |
| Hal Daub | 1981–1989 | Nebraska | Republican | 1941–present |
| James A. Daugherty | 1911–1913 | Missouri | Democratic | 1847–1920 |
| Ralph Hunter Daughton | 1944–1947 | Virginia | Democratic | 1885–1958 |
| Thomas Davee | 1837–1841 | Maine | Democratic | 1797–1841 |
| Franklin Davenport | 1799–1801 | New Jersey | Federalist | 1755–1832 |
| Frederick M. Davenport | 1925–1933 | New York | Republican | 1866–1956 |
| Harry J. Davenport | 1949–1951 | Pennsylvania | Democratic | 1902–1977 |
| Ira Davenport | 1885–1889 | New York | Republican | 1841–1904 |
| James Davenport | 1796–1797 | Connecticut | Federalist | 1758–1797 |
| James S. Davenport | 1907–1909 1911–1917 | Oklahoma | Democratic | 1864–1940 |
| John Davenport | 1799–1817 | Connecticut | Federalist | 1752–1830 |
| John Davenport | 1827–1829 | Ohio | National Republican | 1788–1855 |
| Samuel Arza Davenport | 1897–1901 | Pennsylvania | Republican | 1834–1911 |
| Stanley W. Davenport | 1899–1901 | Pennsylvania | Democratic | 1861–1921 |
| Thomas Davenport | 1825–1833 | Virginia | Democratic | 1???–1838 |
| Thomas Davenport | 1833–1835 | Virginia | National Republican | 1???–1838 |
| Martin L. Davey | 1918–1921 1923–1929 | Ohio | Democratic | 1884–1946 |
| Robert C. Davey | 1893–1895 1897–1908 | Louisiana | Democratic | 1853–1908 |
| Alexander C. Davidson | 1885–1889 | Alabama | Democratic | 1826–1897 |
| Irwin D. Davidson | 1955–1956 | New York | Democratic-Liberal | 1906–1981 |
| James H. Davidson | 1897–1913 1917–1918 | Wisconsin | Republican | 1858–1918 |
| Robert H. M. Davidson | 1877–1891 | Florida | Democratic | 1832–1908 |
| Thomas G. Davidson | 1855–1861 | Louisiana | Democratic | 1805–1883 |
| William Davidson | 1818–1821 | North Carolina | Federalist | 1778–1857 |
| Edward Davies | 1837–1841 | Pennsylvania | Anti-Masonic | 1779–1853 |
| John C. Davies II | 1949–1951 | New York | Democratic | 1920–2002 |
| Alexander Davis | 1873–1874 | Virginia | Democratic | 1833–1889 |
| Amos Davis | 1833–1835 | Kentucky | National Republican | 1794–1835 |
| Artur Davis | 2003–2011 | Alabama | Democratic | 1967–present |
| Charles Russell Davis | 1903–1925 | Minnesota | Republican | 1849–1930 |
| Clifford Davis | 1940–1965 | Tennessee | Democratic | 1897–1970 |
| James H. Davis | 1915–1917 | Texas | Democratic | 1853–1940 |
| David Davis | 2007–2009 | Tennessee | Republican | 1959–present |
| Ewin L. Davis | 1919–1933 | Tennessee | Democratic | 1876–1949 |
| Garrett Davis | 1839–1847 | Kentucky | Whig | 1801–1872 |
| Geoff Davis | 2005–2012 | Kentucky | Republican | 1958–present |
| George R. Davis | 1879–1885 | Illinois | Republican | 1840–1899 |
| George T. Davis | 1851–1853 | Massachusetts | Whig | 1810–1877 |
| Glenn Robert Davis | 1947–1957 1965–1974 | Wisconsin | Republican | 1914–1988 |
| Henry Winter Davis | 1855–1861 | Maryland | American | 1817–1865 |
| Henry Winter Davis | 1863–1865 | Maryland | Unconditional Unionist | 1817–1865 |
| Horace Davis | 1877–1881 | California | Republican | 1831–1916 |
| Jack Davis | 1987–1989 | Illinois | Republican | 1935–2018 |
| Jacob C. Davis | 1856–1857 | Illinois | Democratic | 1820–1883 |
| Jacob E. Davis | 1941–1943 | Ohio | Democratic | 1905–2003 |
| James C. Davis | 1947–1963 | Georgia | Democratic | 1895–1981 |
| Jefferson Davis | 1845–1846 | Mississippi | Democratic | 1808–1889 |
| Jim Davis | 1997–2007 | Florida | Democratic | 1957–present |
| Jo Ann Davis | 2001–2007 | Virginia | Republican | 1950–2007 |
| John Davis | 1825–1834 | Massachusetts | National Republican | 1787–1854 |
| John Davis | 1839–1841 | Pennsylvania | Democratic | 1788–1878 |
| John Davis | 1891–1895 | Kansas | Populist | 1826–1901 |
| John G. Davis | 1851–1855 1857–1859 | Indiana | Democratic | 1810–1866 |
| John G. Davis | 1859–1861 | Indiana | Anti-Lecompton Democratic | 1810–1866 |
| John James Davis | 1871–1873 | West Virginia | Democratic | 1835–1916 |
| John James Davis | 1873–1875 | West Virginia | Independent Democrat | 1835–1916 |
| John W. Davis | 1911–1913 | West Virginia | Democratic | 1873–1955 |
| John Wesley Davis | 1835–1837 1839–1841 1843–1847 | Indiana | Democratic | 1799–1859 |
| John William Davis | 1961–1975 | Georgia | Democratic | 1916–1992 |
| Joseph J. Davis | 1875–1881 | North Carolina | Democratic | 1828–1892 |
| Lincoln Davis | 2003–2011 | Tennessee | Democratic | 1943–present |
| Lowndes Henry Davis | 1879–1885 | Missouri | Democratic | 1836–1920 |
| Mendel Jackson Davis | 1971–1981 | South Carolina | Democratic | 1942–2007 |
| Noah Davis | 1869–1870 | New York | Republican | 1818–1902 |
| Reuben Davis | 1857–1861 | Mississippi | Democratic | 1813–1890 |
| Richard D. Davis | 1841–1845 | New York | Democratic | 1799–1871 |
| Robert Lee Davis | 1932–1933 | Pennsylvania | Republican | 1893–1967 |
| Robert T. Davis | 1883–1889 | Massachusetts | Republican | 1823–1906 |
| Bob Davis | 1979–1993 | Michigan | Republican | 1932–2009 |
| Robert Wyche Davis | 1897–1905 | Florida | Democratic | 1849–1929 |
| Rodney Davis | 2013–2023 | Illinois | Republican | 1970–present |
| Roger Davis | 1811–1815 | Pennsylvania | Democratic-Republican | 1762–1815 |
| Samuel Davis | 1813–1815 | Massachusetts | Federalist | 1774–1831 |
| Susan Davis | 2001–2021 | California | Democratic | 1944–present |
| Thomas Davis | 1853–1855 | Rhode Island | Democratic | 1806–1895 |
| Thomas Beall Davis | 1905–1907 | West Virginia | Democratic | 1828–1911 |
| Tom Davis | 1995–2008 | Virginia | Republican | 1949–present |
| Thomas Terry Davis | 1797–1803 | Kentucky | Democratic-Republican | 17??–1807 |
| Thomas Treadwell Davis | 1863–1865 | New York | Unionist | 1810–1872 |
| Thomas Treadwell Davis | 1865–1867 | New York | Republican | 1810–1872 |
| Timothy Davis | 1855–1857 | Massachusetts | American | 1821–1888 |
| Timothy Davis | 1857–1859 | Massachusetts | Republican | 1821–1888 |
| Timothy Davis | 1857–1859 | Iowa | Republican | 1794–1872 |
| Warren R. Davis | 1827–1831 | South Carolina | Democratic | 1793–1835 |
| Warren R. Davis | 1831–1835 | South Carolina | Nullifier | 1793–1835 |
| William Morris Davis | 1861–1863 | Pennsylvania | Republican | 1815–1891 |
| George M. Davison | 1897–1899 | Kentucky | Republican | 1855–1912 |
| John M. Davy | 1875–1877 | New York | Republican | 1835–1909 |
| Beman Gates Dawes | 1905–1909 | Ohio | Republican | 1870–1953 |
| Henry L. Dawes | 1857–1875 | Massachusetts | Republican | 1816–1903 |
| Rufus Dawes | 1881–1883 | Ohio | Republican | 1838–1899 |
| Albert F. Dawson | 1905–1911 | Iowa | Republican | 1872–1949 |
| John Dawson | 1797–1814 | Virginia | Democratic-Republican | 1762–1814 |
| John Bennett Dawson | 1841–1845 | Louisiana | Democratic | 1798–1845 |
| John Littleton Dawson | 1851–1855 1863–1867 | Pennsylvania | Democratic | 1813–1870 |
| William Dawson | 1885–1887 | Missouri | Democratic | 1848–1929 |
| William A. Dawson | 1947–1949 1953–1959 | Utah | Republican | 1903–1981 |
| William C. Dawson | 1836–1841 | Georgia | Whig | 1798–1856 |
| William Johnston Dawson | 1793–1795 | North Carolina | Anti-Administration | 1765–1796 |
| William L. Dawson | 1943–1970 | Illinois | Democratic | 1886–1970 |
| Rowland Day | 1823–1825 | New York | Democratic-Republican | 1779–1853 |
| Rowland Day | 1833–1835 | New York | Democratic | 1779–1853 |
| Stephen A. Day | 1941–1945 | Illinois | Republican | 1882–1950 |
| Timothy C. Day | 1855–1857 | Ohio | Oppositionist | 1819–1869 |
| Charles Dayan | 1831–1833 | New York | Democratic | 1792–1877 |
| Alston G. Dayton | 1895–1905 | West Virginia | Republican | 1857–1920 |
| Jonathan Dayton | 1791–1795 | New Jersey | Pro-Administration | 1760–1824 |
| Jonathan Dayton | 1795–1799 | New Jersey | Federalist | 1760–1824 |
| David A. De Armond | 1891–1909 | Missouri | Democratic | 1844–1909 |
| Rezin A. De Bolt | 1875–1877 | Missouri | Democratic | 1828–1891 |
| Henry S. De Forest | 1911–1913 | New York | Republican | 1847–1917 |
| Robert E. De Forest | 1891–1895 | Connecticut | Democratic | 1845–1924 |
| John I. De Graff | 1827–1829 1837–1839 | New York | Democratic | 1783–1848 |
| Reese C. De Graffenreid | 1897–1902 | Texas | Democratic | 1859–1902 |
| John J. De Haven | 1889–1890 | California | Republican | 1849–1913 |
| Daniel De Jarnette | 1859–1861 | Virginia | Independent Democrat | 1822–1881 |
| Kika de la Garza | 1965–1997 | Texas | Democratic | 1927–2017 |
| Gilbert De La Matyr | 1879–1881 | Indiana | Greenbacker | 1825–1892 |
| James De La Montanya | 1839–1841 | New York | Democratic | 1798–1849 |
| Hugh De Lacy | 1945–1947 | Washington | Democratic | 1910–1986 |
| Milton De Lano | 1887–1891 | New York | Republican | 1844–1922 |
| Robert C. De Large | 1871–1873 | South Carolina | Republican | 1842–1874 |
| Ron de Lugo | 1973–1979 1981–1995 | U.S. Virgin Islands | Democratic | 1930–2020 |
| John De Mott | 1845–1847 | New York | Democratic | 1790–1870 |
| Mark L. De Motte | 1881–1883 | Indiana | Republican | 1832–1908 |
| Peter J. De Muth | 1937–1939 | Pennsylvania | Democratic | 1892–1993 |
| Oscar De Priest | 1929–1935 | Illinois | Republican | 1871–1951 |
| René L. De Rouen | 1927–1941 | Louisiana | Democratic | 1874–1942 |
| Jaime C. de Veyra | 1917–1923 | Philippines | Nacionalista | 1873–1963 |
| Marion De Vries | 1897–1900 | California | Democratic | 1865–1939 |
| Alexander De Witt | 1853–1855 | Massachusetts | Free Soiler | 1798–1879 |
| Alexander De Witt | 1855–1857 | Massachusetts | American | 1798–1879 |
| Charles G. DeWitt | 1829–1831 | New York | Democratic | 1789–1839 |
| David M. De Witt | 1873–1875 | New York | Democratic | 1837–1912 |
| Francis B. De Witt | 1895–1897 | Ohio | Republican | 1849–1929 |
| Jacob H. De Witt | 1819–1821 | New York | Democratic-Republican | 1784–1857 |
| Joseph T. Deal | 1921–1929 | Virginia | Democratic | 1860–1942 |
| Nathan Deal | 1993–1997 | Georgia | Democratic | 1942–present |
| Nathan Deal | 1997–2010 | Georgia | Republican | 1942–present |
| Benjamin Dean | 1878–1879 | Massachusetts | Democratic | 1824–1897 |
| Ezra Dean | 1841–1845 | Ohio | Democratic | 1795–1872 |
| Gilbert Dean | 1851–1854 | New York | Democratic | 1819–1870 |
| Josiah Dean | 1807–1809 | Massachusetts | Democratic-Republican | 1748–1818 |
| Sidney Dean | 1855–1857 | Connecticut | American | 1818–1901 |
| Sidney Dean | 1857–1859 | Connecticut | Republican | 1818–1901 |
| Charles B. Deane | 1947–1957 | North Carolina | Democratic | 1898–1969 |
| Cleveland Dear | 1933–1937 | Louisiana | Democratic | 1888–1950 |
| Henry Dearborn | 1793–1795 | Massachusetts | Anti-Administration | 1751–1829 |
| Henry Dearborn | 1795–1797 | Massachusetts | Democratic-Republican | 1751–1829 |
| Henry Alexander Scammell Dearborn | 1831–1833 | Massachusetts | National Republican | 1783–1851 |
| Edmund Deberry | 1829–1831 1833–1837 | North Carolina | National Republican | 1787–1859 |
| Edmund Deberry | 1837–1845 1849–1851 | North Carolina | Whig | 1787–1859 |
| H. Joel Deckard | 1979–1983 | Indiana | Republican | 1942–2016 |
| Perl D. Decker | 1913–1919 | Missouri | Democratic | 1875–1934 |
| Elias Deemer | 1901–1907 | Pennsylvania | Republican | 1838–1918 |
| Braswell Deen | 1933–1939 | Georgia | Democratic | 1893–1981 |
| Nathaniel Cobb Deering | 1877–1883 | Iowa | Republican | 1827–1887 |
| Peter DeFazio | 1987–2023 | Oregon | Democratic | 1947–present |
| Joseph H. Defrees | 1865–1867 | Indiana | Republican | 1812–1885 |
| Edward Degener | 1870–1871 | Texas | Republican | 1809–1890 |
| Federico Degetau | 1901–1905 | Puerto Rico | Republican | 1862–1914 |
| Edward deGraffenried | 1949–1953 | Alabama | Democratic | 1899–1974 |
| Frederick Simpson Deitrick | 1913–1915 | Massachusetts | Democratic | 1875–1948 |
| Bill Delahunt | 1997–2011 | Massachusetts | Democratic | 1941–2024 |
| James J. Delaney | 1945–1947 1949–1978 | New York | Democratic | 1901–1987 |
| John Delaney | 2013–2019 | Maryland | Democratic | 1963–present |
| John J. Delaney | 1918–1919 1931–1948 | New York | Democratic | 1878–1948 |
| Charles Delano | 1859–1863 | Massachusetts | Republican | 1820–1883 |
| Columbus Delano | 1845–1847 | Ohio | Whig | 1809–1896 |
| Columbus Delano | 1865–1867 1868–1869 | Ohio | Republican | 1809–1896 |
| Isaac C. Delaplaine | 1861–1863 | New York | Democratic | 1817–1866 |
| Tom DeLay | 1985–2006 | Texas | Republican | 1947–present |
| Antonio Delgado | 2019–2022 | New York | Democratic | 1977–present |
| Francisco Afan Delgado | 1935–1936 | Philippines | Nacionalista | 1886–1964 |
| Vincent J. Dellay | 1957 | New Jersey | Republican | 1907–1999 |
| Vincent J. Dellay | 1957–1959 | New Jersey | Democratic | 1907–1999 |
| John R. Dellenback | 1967–1975 | Oregon | Republican | 1918–2002 |
| James Dellet | 1839–1841 1843–1845 | Alabama | Whig | 1788–1848 |
| Ron Dellums | 1971–1998 | California | Democratic | 1935–2018 |
| Benjamin F. Deming | 1833–1834 | Vermont | Anti-Masonic | 1790–1834 |
| Henry C. Deming | 1863–1867 | Connecticut | Republican | 1815–1872 |
| Val Demings | 2017–2023 | Florida | Democratic | 1957–present |
| Jim DeMint | 1999–2005 | South Carolina | Republican | 1951–present |
| John J. Dempsey | 1935–1941 1951–1958 | New Mexico | Democratic | 1879–1958 |
| S. Wallace Dempsey | 1915–1931 | New York | Republican | 1862–1949 |
| Lawrence J. DeNardis | 1981–1983 | Connecticut | Republican | 1938–2018 |
| Edwin Denby | 1905–1911 | Michigan | Republican | 1870–1929 |
| Jeff Denham | 2011–2019 | California | Republican | 1967–present |
| Frank E. Denholm | 1971–1975 | South Dakota | Democratic | 1923–2016 |
| Charles Denison | 1863–1867 | Pennsylvania | Democratic | 1818–1867 |
| Dudley Chase Denison | 1875–1877 | Vermont | Independent Republican | 1819–1905 |
| Dudley Chase Denison | 1877–1879 | Vermont | Republican | 1819–1905 |
| Edward E. Denison | 1915–1931 | Illinois | Republican | 1873–1953 |
| George Denison | 1819–1823 | Pennsylvania | Democratic-Republican | 1790–1831 |
| Robert Vernon Denney | 1967–1971 | Nebraska | Republican | 1916–1981 |
| William Denning | 1809–1810 | New York | Democratic-Republican | 1740–1819 |
| David W. Dennis | 1969–1975 | Indiana | Republican | 1912–1999 |
| John Dennis | 1797–1805 | Maryland | Federalist | 1771–1806 |
| John Dennis | 1837–1841 | Maryland | Whig | 1807–1859 |
| Littleton Purnell Dennis | 1833–1834 | Maryland | National Republican | 1786–1834 |
| David S. Dennison Jr. | 1957–1959 | Ohio | Republican | 1918–2001 |
| Arthur A. Denny | 1865–1867 | Washington | Republican | 1822–1899 |
| Harmar Denny | 1829–1837 | Pennsylvania | Anti-Masonic | 1794–1852 |
| Harmar D. Denny Jr. | 1951–1953 | Pennsylvania | Republican | 1886–1966 |
| James William Denny | 1899–1901 1903–1905 | Maryland | Democratic | 1838–1923 |
| Walter M. Denny | 1895–1897 | Mississippi | Democratic | 1853–1926 |
| Peter Denoyelles | 1813–1815 | New York | Democratic-Republican | 1766–1829 |
| William H. Denson | 1893–1895 | Alabama | Democratic | 1846–1906 |
| Charlie Dent | 2005–2018 | Pennsylvania | Republican | 1960–present |
| George Dent | 1793–1795 | Maryland | Pro-Administration | 1756–1813 |
| George Dent | 1795–1801 | Maryland | Federalist | 1756–1813 |
| John Herman Dent | 1958–1979 | Pennsylvania | Democratic | 1908–1988 |
| S. Hubert Dent Jr. | 1909–1921 | Alabama | Democratic | 1869–1938 |
| William Dent | 1853–1855 | Georgia | Democratic | 1806–1855 |
| George K. Denton | 1917–1919 | Indiana | Democratic | 1864–1926 |
| Winfield K. Denton | 1949–1953 1955–1966 | Indiana | Democratic | 1896–1971 |
| James W. Denver | 1855–1857 | California | Democratic | 1817–1892 |
| Matthew Denver | 1907–1913 | Ohio | Democratic | 1870–1954 |
| Steven Derounian | 1953–1965 | New York | Republican | 1918–2007 |
| Butler Derrick | 1975–1995 | South Carolina | Democratic | 1936–2014 |
| Franklin Lewis Dershem | 1913–1915 | Pennsylvania | Democratic | 1865–1950 |
| Ed Derwinski | 1959–1983 | Illinois | Republican | 1926–2012 |
| Ron DeSantis | 2013–2018 | Florida | Republican | 1978–present |
| Joseph Desha | 1807–1819 | Kentucky | Democratic-Republican | 1768–1842 |
| Robert Desha | 1827–1831 | Tennessee | Democratic | 1791–1849 |
| Peter V. Deuster | 1879–1885 | Wisconsin | Democratic | 1831–1904 |
| Ted Deutch | 2010–2022 | Florida | Democratic | 1966–present |
| Peter Deutsch | 1993–2005 | Florida | Democratic | 1957–present |
| James Devereux | 1951–1959 | Maryland | Republican | 1903–1988 |
| Samuel L. Devine | 1959–1981 | Ohio | Republican | 1915–1997 |
| Edward Devitt | 1947–1949 | Minnesota | Republican | 1911–1992 |
| Arthur Granville Dewalt | 1915–1921 | Pennsylvania | Democratic | 1854–1931 |
| Lewis Dewart | 1831–1833 | Pennsylvania | Democratic | 1780–1852 |
| William Lewis Dewart | 1857–1859 | Pennsylvania | Democratic | 1821–1888 |
| John T. Deweese | 1868–1870 | North Carolina | Republican | 1835–1906 |
| Charles S. Dewey | 1941–1945 | Illinois | Republican | 1880–1980 |
| Daniel Dewey | 1813–1814 | Massachusetts | Federalist | 1766–1815 |
| Mike DeWine | 1983–1991 | Ohio | Republican | 1947–present |
| Samuel Dexter | 1793–1795 | Massachusetts | Pro-Administration | 1761–1816 |
| John F. Dezendorf | 1881–1883 | Virginia | Republican | 1834–1894 |
| Lincoln Díaz-Balart | 1993–2011 | Florida | Republican | 1954–2025 |
| Samuel Dibble | 1881–1882 1883–1891 | South Carolina | Democratic | 1837–1913 |
| George Gibbs Dibrell | 1875–1885 | Tennessee | Democratic | 1822–1888 |
| Charles W. F. Dick | 1898–1904 | Ohio | Republican | 1858–1945 |
| John Dick | 1853–1855 | Pennsylvania | Whig | 1794–1872 |
| John Dick | 1855–1857 | Pennsylvania | Oppositionist | 1794–1872 |
| John Dick | 1857–1859 | Pennsylvania | Republican | 1794–1872 |
| Samuel Bernard Dick | 1879–1881 | Pennsylvania | Republican | 1836–1907 |
| Samuel Dickens | 1816–1817 | North Carolina | Democratic-Republican | died 1840 |
| Charles Heber Dickerman | 1903–1905 | Pennsylvania | Democratic | 1843–1915 |
| Philemon Dickerson | 1833–1836 1839–1841 | New Jersey | Democratic | 1788–1862 |
| William Worth Dickerson | 1890–1893 | Kentucky | Democratic | 1851–1923 |
| Henry L. Dickey | 1877–1881 | Ohio | Democratic | 1832–1910 |
| Jay Dickey | 1993–2001 | Arkansas | Republican | 1939−2017 |
| Jesse C. Dickey | 1849–1851 | Pennsylvania | Whig | 1808–1891 |
| John Dickey | 1843–1845 1847–1849 | Pennsylvania | Whig | 1794–1853 |
| Oliver James Dickey | 1868–1873 | Pennsylvania | Republican | 1823–1876 |
| Clement C. Dickinson | 1910–1921 1923–1929 1931–1935 | Missouri | Democratic | 1849–1938 |
| David W. Dickinson | 1833–1835 | Tennessee | Democratic | 1808–1845 |
| David W. Dickinson | 1843–1845 | Tennessee | Whig | 1808–1845 |
| Edward Dickinson | 1853–1855 | Massachusetts | Whig | 1803–1874 |
| Edward F. Dickinson | 1869–1871 | Ohio | Democratic | 1829–1891 |
| John Dean Dickinson | 1819–1823 | New York | Federalist | 1767–1841 |
| John Dean Dickinson | 1827–1831 | New York | National Republican | 1767–1841 |
| L. J. Dickinson | 1919–1931 | Iowa | Republican | 1873–1968 |
| Rodolphus Dickinson | 1847–1849 | Ohio | Democratic | 1797–1849 |
| William L. Dickinson | 1965–1993 | Alabama | Republican | 1925–2008 |
| Norm Dicks | 1977–2013 | Washington | Democratic | 1940–present |
| David C. Dickson | 1835–1836 | Mississippi | National Republican | 1794–1836 |
| Frank S. Dickson | 1905–1907 | Illinois | Republican | 1876–1953 |
| John Dickson | 1831–1835 | New York | Anti-Masonic | 1783–1852 |
| Joseph Dickson | 1799–1801 | North Carolina | Federalist | 1745–1825 |
| Samuel Dickson | 1855–1857 | New York | Oppositionist | 1807–1858 |
| William Dickson | 1801–1807 | Tennessee | Democratic-Republican | 1770–1816 |
| William A. Dickson | 1909–1913 | Mississippi | Democratic | 1861–1940 |
| Samuel Dickstein | 1923–1945 | New York | Democratic | 1885–1954 |
| Gerrit J. Diekema | 1907–1911 | Michigan | Republican | 1859–1930 |
| Martin Dies Sr. | 1909–1919 | Texas | Democratic | 1870–1922 |
| Martin Dies Jr. | 1931–1945 1953–1959 | Texas | Democratic | 1900–1972 |
| William H. Dieterich | 1931–1933 | Illinois | Democratic | 1876–1940 |
| Charles E. Dietrich | 1935–1937 | Pennsylvania | Democratic | 1889–1942 |
| William Dietz | 1825–1827 | New York | Democratic | 1778–1848 |
| Robert E. Difenderfer | 1911–1915 | Pennsylvania | Democratic | 1849–1923 |
| Charles Diggs | 1955–1980 | Michigan | Democratic | 1922–1998 |
| Clarence Dill | 1915–1919 | Washington | Democratic | 1884–1978 |
| Paul Dillingham | 1843–1847 | Vermont | Democratic | 1799–1891 |
| Charles Hall Dillon | 1913–1919 | South Dakota | Republican | 1853–1929 |
| LaVern Dilweg | 1943–1945 | Wisconsin | Democratic | 1903–1968 |
| Milo Melankthon Dimmick | 1849–1853 | Pennsylvania | Democratic | 1811–1872 |
| William Harrison Dimmick | 1857–1861 | Pennsylvania | Democratic | 1815–1861 |
| Davis Dimock Jr. | 1841–1842 | Pennsylvania | Democratic | 1801–1842 |
| Anthony Dimond | 1933–1945 | Alaska | Democratic | 1881–1953 |
| John Dingell Sr. | 1933–1955 | Michigan | Democratic | 1894–1955 |
| John Dingell | 1955–2015 | Michigan | Democratic | 1926–2019 |
| Nelson Dingley Jr. | 1881–1899 | Maine | Republican | 1832–1899 |
| Samuel Dinsmoor | 1811–1813 | New Hampshire | Democratic-Republican | 1766–1835 |
| Hugh A. Dinsmore | 1893–1905 | Arkansas | Democratic | 1850–1930 |
| Joe DioGuardi | 1985–1989 | New York | Republican | 1940–present |
| Everett Dirksen | 1933–1949 | Illinois | Republican | 1896–1969 |
| David T. Disney | 1849–1855 | Ohio | Democratic | 1803–1857 |
| Wesley E. Disney | 1931–1945 | Oklahoma | Democratic | 1883–1961 |
| J. William Ditter | 1933–1943 | Pennsylvania | Republican | 1888–1943 |
| Alexander S. Diven | 1861–1863 | New York | Republican | 1809–1896 |
| Henry Aldous Dixon | 1955–1961 | Utah | Republican | 1890–1967 |
| James Dixon | 1845–1849 | Connecticut | Whig | 1814–1873 |
| Joseph Dixon | 1870–1871 | North Carolina | Republican | 1828–1883 |
| Joseph A. Dixon | 1937–1939 | Ohio | Democratic | 1879–1942 |
| Joseph M. Dixon | 1903–1907 | Montana | Republican | 1867–1934 |
| Julian Dixon | 1979–2000 | California | Democratic | 1934–2000 |
| Lincoln Dixon | 1905–1919 | Indiana | Democratic | 1860–1932 |
| Nathan F. Dixon II | 1849–1851 | Rhode Island | Whig | 1812–1881 |
| Nathan F. Dixon II | 1863–1871 | Rhode Island | Republican | 1812–1881 |
| Nathan F. Dixon III | 1885 | Rhode Island | Republican | 1847–1897 |
| William W. Dixon | 1891–1893 | Montana | Democratic | 1838–1910 |
| Charles Djou | 2010–2011 | Hawaii | Republican | 1970–present |
| Robert E. Doan | 1891–1893 | Ohio | Republican | 1831–1919 |
| William Doan | 1839–1843 | Ohio | Democratic | 1792–1847 |
| James C. Dobbin | 1845–1847 | North Carolina | Democratic | 1814–1857 |
| Donald C. Dobbins | 1933–1937 | Illinois | Democratic | 1878–1943 |
| Samuel A. Dobbins | 1873–1877 | New Jersey | Republican | 1814–1886 |
| Alexander Monroe Dockery | 1883–1899 | Missouri | Democratic | 1845–1926 |
| Alfred Dockery | 1845–1847 1851–1853 | North Carolina | Whig | 1797–1875 |
| Oliver H. Dockery | 1868–1871 | North Carolina | Republican | 1830–1906 |
| John F. Dockweiler | 1933–1939 | California | Democratic | 1895–1943 |
| Chris Dodd | 1975–1981 | Connecticut | Democratic | 1944–present |
| Edward Dodd | 1855–1857 | New York | Oppositionist | 1805–1891 |
| Edward Dodd | 1857–1859 | New York | Republican | 1805–1891 |
| Thomas J. Dodd | 1953–1957 | Connecticut | Democratic | 1907–1971 |
| Philip Doddridge | 1829–1832 | Virginia | National Republican | 1773–1832 |
| Francis H. Dodds | 1909–1913 | Michigan | Republican | 1858–1940 |
| Ozro J. Dodds | 1872–1873 | Ohio | Democratic | 1840–1882 |
| Augustus C. Dodge | 1840–1846 | Iowa | Democratic | 1812–1883 |
| Grenville M. Dodge | 1867–1869 | Iowa | Republican | 1831–1916 |
| Henry Dodge | 1841–1845 | Wisconsin | Democratic | 1782–1867 |
| William E. Dodge | 1866–1867 | New York | Republican | 1805–1883 |
| Nicholas B. Doe | 1840–1841 | New York | Whig | 1786–1856 |
| Andrew W. Doig | 1839–1843 | New York | Democratic | 1799–1875 |
| Bob Dold | 2011–2013 2015–2017 | Illinois | Republican | 1969–present |
| Bob Dole | 1961–1969 | Kansas | Republican | 1923–2021 |
| Isidore Dollinger | 1949–1959 | New York | Democratic | 1903–2000 |
| James I. Dolliver | 1945–1957 | Iowa | Republican | 1894–1978 |
| Jonathan P. Dolliver | 1889–1900 | Iowa | Republican | 1858–1910 |
| James R. Domengeaux | 1941–1944 1944–1949 | Louisiana | Democratic | 1907–1988 |
| Frederick H. Dominick | 1917–1933 | South Carolina | Democratic | 1877–1960 |
| Peter H. Dominick | 1961–1963 | Colorado | Republican | 1915–1981 |
| George Anthony Dondero | 1933–1957 | Michigan | Republican | 1883–1968 |
| Joseph Benton Donley | 1869–1871 | Pennsylvania | Republican | 1838–1917 |
| William G. Donnan | 1871–1875 | Iowa | Republican | 1834–1908 |
| Richard Spaight Donnell | 1847–1849 | North Carolina | Whig | 1820–1867 |
| Brian J. Donnelly | 1979–1993 | Massachusetts | Democratic | 1946–2023 |
| Ignatius L. Donnelly | 1863–1869 | Minnesota | Republican | 1831–1901 |
| Joe Donnelly | 2007–2013 | Indiana | Democratic | 1955–present |
| Michael Donohoe | 1911–1915 | Pennsylvania | Democratic | 1864–1958 |
| Harold Donohue | 1947–1974 | Massachusetts | Democratic | 1901–1984 |
| Dan Donovan | 2015–2019 | New York | Republican | 1956–present |
| Dennis D. Donovan | 1891–1895 | Ohio | Democratic | 1859–1941 |
| James G. Donovan | 1951–1957 | New York | Democratic | 1898–1987 |
| Jeremiah Donovan | 1913–1915 | Connecticut | Democratic | 1857–1935 |
| Jerome F. Donovan | 1918–1921 | New York | Democratic | 1872–1949 |
| Cal Dooley | 1991–2005 | California | Democratic | 1954–present |
| Edwin B. Dooley | 1957–1963 | New York | Republican | 1905–1982 |
| Peter J. Dooling | 1913–1921 | New York | Democratic | 1857–1931 |
| Dudley Doolittle | 1913–1919 | Kansas | Democratic | 1881–1957 |
| John Doolittle | 1991–2009 | California | Republican | 1950–present |
| William H. Doolittle | 1893–1897 | Washington | Republican | 1848–1914 |
| Frank Ellsworth Doremus | 1911–1921 | Michigan | Democratic | 1865–1947 |
| Byron Dorgan | 1981–1992 | North Dakota | Democratic | 1942–present |
| Francis E. Dorn | 1953–1961 | New York | Republican | 1911–1987 |
| William Jennings Bryan Dorn | 1947–1949 1951–1974 | South Carolina | Democratic | 1916–2005 |
| Bob Dornan | 1977–1983 1985–1997 | California | Republican | 1933–present |
| Charles Dorr | 1897–1899 | West Virginia | Republican | 1852–1914 |
| Clement Dorsey | 1825–1831 | Maryland | National Republican | 1778–1848 |
| Frank J. G. Dorsey | 1935–1939 | Pennsylvania | Democratic | 1891–1949 |
| George Washington Emery Dorsey | 1885–1891 | Nebraska | Republican | 1842–1911 |
| John Lloyd Dorsey Jr. | 1930–1931 | Kentucky | Democratic | 1891–1960 |
| William Dorsheimer | 1883–1885 | New York | Democratic | 1832–1888 |
| James Duane Doty | 1839–1841 1849–1851 | Wisconsin | Democratic | 1799–1865 |
| James Duane Doty | 1851–1853 | Wisconsin | Independent Democrat | 1799–1865 |
| Ulysses F. Doubleday | 1831–1833 1835–1837 | New York | Democratic | 1792–1866 |
| Charles Dougherty | 1885–1889 | Florida | Democratic | 1850–1915 |
| Charles F. Dougherty | 1979–1983 | Pennsylvania | Republican | 1937–present |
| John Dougherty | 1899–1905 | Missouri | Democratic | 1857–1905 |
| Robert L. Doughton | 1911–1953 | North Carolina | Democratic | 1863–1954 |
| Albert Douglas | 1907–1911 | Ohio | Republican | 1852–1935 |
| Beverly B. Douglas | 1875–1878 | Virginia | Democratic | 1822–1878 |
| Chuck Douglas | 1989–1991 | New Hampshire | Republican | 1942–present |
| Emily Taft Douglas | 1945–1947 | Illinois | Democratic | 1899–1994 |
| Fred J. Douglas | 1937–1945 | New York | Republican | 1869–1949 |
| Helen Gahagan Douglas | 1945–1951 | California | Democratic | 1900–1980 |
| Lewis Williams Douglas | 1927–1933 | Arizona | Democratic | 1894–1974 |
| Stephen A. Douglas | 1843–1847 | Illinois | Democratic | 1813–1861 |
| William H. Douglas | 1901–1905 | New York | Republican | 1853–1944 |
| John J. Douglass | 1925–1935 | Massachusetts | Democratic | 1873–1939 |
| Isaac Hoffer Doutrich | 1927–1937 | Pennsylvania | Republican | 1871–1941 |
| Blackburn B. Dovener | 1895–1907 | West Virginia | Republican | 1842–1914 |
| John G. Dow | 1965–1969 1971–1973 | New York | Democratic | 1905–2003 |
| Clement Dowd | 1881–1885 | North Carolina | Democratic | 1832–1898 |
| James F. Dowdell | 1853–1859 | Alabama | Democratic | 1818–1871 |
| Abraham Dowdney | 1885–1886 | New York | Democratic | 1841–1886 |
| John Dowdy | 1952–1973 | Texas | Democratic | 1912–1995 |
| Wayne Dowdy | 1981–1989 | Mississippi | Democratic | 1943–present |
| Cassius C. Dowell | 1915–1935 1937–1940 | Iowa | Republican | 1864–1940 |
| Stephen Wheeler Downey | 1879–1881 | Wyoming | Republican | 1839–1902 |
| Thomas Downey | 1975–1993 | New York | Democratic | 1949–present |
| Charles Downing | 1837–1841 | Florida | Democratic | died 1841 |
| Finis E. Downing | 1895–1896 | Illinois | Democratic | 1846–1936 |
| Thomas N. Downing | 1959–1977 | Virginia | Democratic | 1919–2001 |
| Le Roy D. Downs | 1941–1943 | Connecticut | Democratic | 1900–1970 |
| Edward Dowse | 1819–1820 | Massachusetts | Democratic-Republican | 1756–1828 |
| Peter M. Dox | 1869–1873 | Alabama | Democratic | 1813–1891 |
| Charles T. Doxey | 1883 | Indiana | Republican | 1841–1898 |
| Wall Doxey | 1929–1941 | Mississippi | Democratic | 1892–1962 |
| Clyde Doyle | 1945–1947 1949–1963 | California | Democratic | 1887–1963 |
| Mike Doyle | 1995–2022 | Pennsylvania | Democratic | 1953–present |
| Thomas A. Doyle | 1923–1931 | Illinois | Democratic | 1886–1935 |
| John R. Drake | 1817–1819 | New York | Democratic-Republican | 1782–1857 |
| Thelma Drake | 2005–2009 | Virginia | Republican | 1949–present |
| Herbert J. Drane | 1917–1933 | Florida | Democratic | 1863–1947 |
| Joseph Draper | 1830–1831 1832–1833 | Virginia | Democratic | 1794–1834 |
| William Franklin Draper | 1893–1897 | Massachusetts | Republican | 1842–1910 |
| William Henry Draper | 1901–1913 | New York | Republican | 1841–1921 |
| William Drayton | 1825–1833 | South Carolina | Democratic | 1776–1846 |
| David Dreier | 1981–2013 | California | Republican | 1952–present |
| Solomon Robert Dresser | 1903–1907 | Pennsylvania | Republican | 1842–1911 |
| Ira W. Drew | 1937–1939 | Pennsylvania | Democratic | 1878–1972 |
| Patrick H. Drewry | 1920–1947 | Virginia | Democratic | 1875–1947 |
| Steve Driehaus | 2009–2011 | Ohio | Democratic | 1966–present |
| Edmund H. Driggs | 1897–1901 | New York | Democratic | 1865–1946 |
| John F. Driggs | 1863–1869 | Michigan | Republican | 1813–1877 |
| Robert Drinan | 1971–1981 | Massachusetts | Democratic | 1920–2007 |
| Daniel A. Driscoll | 1909–1917 | New York | Democratic | 1875–1955 |
| Denis J. Driscoll | 1935–1937 | Pennsylvania | Democratic | 1871–1958 |
| Michael E. Driscoll | 1899–1913 | New York | Republican | 1851–1929 |
| William J. Driver | 1921–1939 | Arkansas | Democratic | 1873–1948 |
| George Dromgoole | 1835–1841 1843–1847 | Virginia | Democratic | 1797–1847 |
| Dow H. Drukker | 1914–1919 | New Jersey | Republican | 1872–1963 |
| Augustus Drum | 1853–1855 | Pennsylvania | Democratic | 1815–1858 |
| John Duarte | 2023–2025 | California | Republican | 1966–present |
| Dudley M. DuBose | 1871–1873 | Georgia | Democratic | 1834–1883 |
| Pete du Pont | 1971–1977 | Delaware | Republican | 1935–2021 |
| Fred Dubois | 1887–1890 | Idaho | Republican | 1851–1930 |
| Tammy Duckworth | 2013–2017 | Illinois | Democratic | 1968–present |
| Edward Bishop Dudley | 1829–1831 | North Carolina | Democratic | 1789–1855 |
| R. Holland Duell | 1859–1863 1871–1875 | New York | Republican | 1824–1891 |
| William Duer | 1847–1851 | New York | Whig | 1805–1879 |
| Warren J. Duffey | 1933–1936 | Ohio | Democratic | 1886–1936 |
| James P. B. Duffy | 1935–1937 | New York | Democratic | 1878–1969 |
| Sean Duffy | 2011–2019 | Wisconsin | Republican | 1971–present |
| P. Henry Dugro | 1881–1883 | New York | Democratic | 1855–1920 |
| Richard Thomas Walker Duke | 1870–1871 | Virginia | Conservative | 1822–1898 |
| Richard Thomas Walker Duke | 1871–1873 | Virginia | Democratic | 1822–1898 |
| Thaddeus J. Dulski | 1959–1974 | New York | Democratic | 1915–1988 |
| Ebenezer Dumont | 1863–1865 | Indiana | Unionist | 1814–1871 |
| Ebenezer Dumont | 1865–1867 | Indiana | Republican | 1814–1871 |
| James W. Dunbar | 1919–1923 1929–1931 | Indiana | Republican | 1860–1943 |
| William Dunbar | 1853–1855 | Louisiana | Democratic | 1805–1861 |
| Alexander Duncan | 1837–1841 1843–1845 | Ohio | Democratic | 1788–1853 |
| Daniel Duncan | 1847–1849 | Ohio | Whig | 1806–1849 |
| Garnett Duncan | 1847–1849 | Kentucky | Whig | 1800–1875 |
| James Duncan | 1821 | Pennsylvania | Democratic-Republican | 1756–1844 |
| James H. Duncan | 1849–1853 | Massachusetts | Whig | 1793–1869 |
| Jeff Duncan | 2011–2025 | South Carolina | Republican | 1966–present |
| Jimmy Duncan | 1988–2019 | Tennessee | Republican | 1947–present |
| John Duncan Sr. | 1965–1988 | Tennessee | Republican | 1919–1988 |
| Joseph Duncan | 1827–1834 | Illinois | Democratic | 1794–1844 |
| Richard M. Duncan | 1933–1943 | Missouri | Democratic | 1889–1974 |
| Robert B. Duncan | 1963–1967 1975–1981 | Oregon | Democratic | 1920–2011 |
| William Addison Duncan | 1883–1884 | Pennsylvania | Democratic | 1836–1884 |
| James I. Dungan | 1891–1893 | Ohio | Democratic | 1844–1931 |
| Cyrus L. Dunham | 1849–1855 | Indiana | Democratic | 1817–1877 |
| Ransom W. Dunham | 1883–1889 | Illinois | Republican | 1838–1896 |
| George W. Dunlap | 1861–1863 | Kentucky | Unionist | 1813–1880 |
| Robert P. Dunlap | 1843–1847 | Maine | Democratic | 1794–1859 |
| William Claiborne Dunlap | 1833–1837 | Tennessee | Democratic | 1798–1872 |
| Aubert C. Dunn | 1935–1937 | Mississippi | Democratic | 1896–1987 |
| George Grundy Dunn | 1847–1849 | Indiana | Whig | 1812–1857 |
| George Grundy Dunn | 1855–1857 | Indiana | Oppositionist | 1812–1857 |
| George Hedford Dunn | 1837–1839 | Indiana | Whig | 1794–1854 |
| James Whitney Dunn | 1981–1983 | Michigan | Republican | 1943–present |
| Jennifer Dunn | 1993–2005 | Washington | Republican | 1941–2007 |
| John T. Dunn | 1893–1895 | New Jersey | Democratic | 1838–1907 |
| Matthew A. Dunn | 1933–1941 | Pennsylvania | Democratic | 1886–1942 |
| Poindexter Dunn | 1879–1889 | Arkansas | Democratic | 1834–1914 |
| Thomas B. Dunn | 1913–1923 | New York | Republican | 1853–1924 |
| William McKee Dunn | 1859–1863 | Indiana | Republican | 1814–1887 |
| Mark H. Dunnell | 1871–1883 1889–1891 | Minnesota | Republican | 1823–1904 |
| Edward J. Dunphy | 1889–1895 | New York | Democratic | 1856–1926 |
| Charles T. Dunwell | 1903–1908 | New York | Republican | 1852–1908 |
| H. Garland Dupré | 1910–1924 | Louisiana | Democratic | 1873–1924 |
| George H. Durand | 1875–1877 | Michigan | Democratic | 1838–1903 |
| Dick Durbin | 1983–1997 | Illinois | Democratic | 1944–present |
| Allan C. Durborow Jr. | 1891–1895 | Illinois | Democratic | 1857–1908 |
| Daniel Meserve Durell | 1807–1809 | New Hampshire | Democratic-Republican | 1769–1841 |
| Cyrus Durey | 1907–1911 | New York | Republican | 1864–1933 |
| Job Durfee | 1821–1825 | Rhode Island | Democratic-Republican | 1790–1847 |
| Nathan B. Durfee | 1855–1857 | Rhode Island | American | 1812–1872 |
| Nathan B. Durfee | 1857–1859 | Rhode Island | Republican | 1812–1872 |
| George R. Durgan | 1933–1935 | Indiana | Democratic | 1872–1942 |
| Carl T. Durham | 1939–1961 | North Carolina | Democratic | 1892–1974 |
| Milton J. Durham | 1873–1879 | Kentucky | Democratic | 1824–1911 |
| Charles Durkee | 1849–1853 | Wisconsin | Free Soiler | 1805–1870 |
| Edwin Durno | 1961–1963 | Oregon | Republican | 1899–1976 |
| Isaac H. Duval | 1869–1871 | West Virginia | Republican | 1824–1902 |
| William Pope Duval | 1813–1815 | Kentucky | Democratic-Republican | 1784–1854 |
| Gabriel Duvall | 1794–1795 | Maryland | Anti-Administration | 1752–1844 |
| Gabriel Duvall | 1795–1796 | Maryland | Democratic-Republican | 1752–1844 |
| Henry W. Dwight | 1821–1825 | Massachusetts | Federalist | 1788–1845 |
| Henry W. Dwight | 1825–1831 | Massachusetts | National Republican | 1788–1845 |
| Jeremiah W. Dwight | 1877–1883 | New York | Republican | 1819–1885 |
| John Wilbur Dwight | 1902–1913 | New York | Republican | 1859–1928 |
| Theodore Dwight | 1806–1807 | Connecticut | Federalist | 1764–1846 |
| Thomas Dwight | 1803–1805 | Massachusetts | Federalist | 1758–1819 |
| Justin Dwinell | 1823–1825 | New York | Democratic-Republican | 1785–1850 |
| Henry Dworshak | 1939–1946 | Idaho | Republican | 1894–1962 |
| Bernard J. Dwyer | 1981–1993 | New Jersey | Democratic | 1921–1998 |
| Florence P. Dwyer | 1957–1973 | New Jersey | Republican | 1902–1976 |
| Kenneth W. Dyal | 1965–1967 | California | Democratic | 1910–1978 |
| David Patterson Dyer | 1869–1871 | Missouri | Republican | 1838–1924 |
| Leonidas C. Dyer | 1911–1914 1915–1933 | Missouri | Republican | 1871–1957 |
| Mervyn Dymally | 1981–1993 | California | Democratic | 1926–2012 |
| Roy Dyson | 1981–1991 | Maryland | Democratic | 1948–present |