List of former members of the United States House of Representatives (O)
Columns: Representative | Years | State | Party | Lifespan
Charles F.X. O'Brien | 1921–1925 | New Jersey | Democratic | 1879–1940 | George D. O'Brien | 1937–1939 1941–1947 1949–1955 | Michigan | Democratic | 1900–1957 | George M. O'Brien | 1973–1986 | Illinois | Republican | 1917–1986 | James O'Brien | 1879–1881 | New York | Independent Democrat | 1841–1907 | James H. O'Brien | 1913–1915 | New York | Democratic | 1860–1924 | Jeremiah O'Brien | 1823–1825 | Maine | Democratic-Republican | 1778–1858 | Jeremiah O'Brien | 1825–1829 | Maine | National Republican | 1778–1858 | Joseph J. O'Brien | 1939–1945 | New York | Republican | 1897–1953 | Leo W. O'Brien | 1952–1966 | New York | Democratic | 1900–1982 | Thomas J. O'Brien | 1933–1939 1943–1964 | Illinois | Democratic | 1878–1964 | William J. O'Brien | 1873–1877 | Maryland | Democratic | 1836–1905 | William S. O'Brien | 1927–1929 | West Virginia | Democratic | 1862–1948 | David J. O'Connell | 1919–1921 1923–1930 | New York | Democratic | 1868–1930 | Jeremiah E. O'Connell | 1923–1927 1929–1930 | Rhode Island | Democratic | 1883–1964 | Jerry J. O'Connell | 1937–1939 | Montana | Democratic | 1909–1956 | John Matthew O'Connell | 1933–1939 | Rhode Island | Democratic | 1872–1941 | Joseph F. O'Connell | 1907–1911 | Massachusetts | Democratic | 1872–1942 | Charles O'Connor | 1929–1931 | Oklahoma | Republican | 1878–1940 | James O'Connor | 1919–1931 | Louisiana | Democratic | 1870–1941 | James F. O'Connor | 1937–1945 | Montana | Democratic | 1878–1945 | John J. O'Connor | 1923–1939 | New York | Democratic | 1885–1960 | Michael P. O'Connor | 1879–1881 | South Carolina | Democratic | 1831–1881 | Caroline O'Day | 1935–1943 | New York | Democratic | 1875–1943 | James O'Donnell | 1885–1893 | Michigan | Republican | 1840–1915 | Charles T. O'Ferrall | 1884–1893 | Virginia | Democratic | 1840–1905 | James M. E. O'Grady | 1899–1901 | New York | Republican | 1863–1928 | Frank T. O'Hair | 1913–1915 | Illinois | Democratic | 1870–1932 | Barratt O'Hara | 1949–1951 1953–1969 | Illinois | Democratic | 1882–1969 | James E. O'Hara | 1883–1887 | North Carolina | Republican | 1844–1905 | James G. O'Hara | 1959–1977 | Michigan | Democratic | 1925–1989 | Joseph P. O'Hara | 1941–1959 | Minnesota | Republican | 1895–1975 | Alvin O'Konski | 1943–1973 | Wisconsin | Republican | 1904–1987 | Denis O'Leary | 1913–1914 | New York | Democratic | 1863–1943 | James A. O'Leary | 1935–1944 | New York | Democratic | 1889–1944 | Thomas O'Malley | 1933–1939 | Wisconsin | Democratic | 1903–1979 | Emmet O'Neal | 1935–1947 | Kentucky | Democratic | 1887–1967 | Maston E. O'Neal, Jr. | 1965–1971 | Georgia | Democratic | 1907–1990 | John H. O'Neall | 1887–1891 | Indiana | Democratic | 1838–1907 | Joseph H. O'Neil | 1889–1895 | Massachusetts | Democratic | 1853–1935 | Charles O'Neill | 1863–1871 1873–1893 | Pennsylvania | Republican | 1821–1893 | Edward L. O'Neill | 1937–1939 | New Jersey | Democratic | 1903–1948 | Harry P. O'Neill | 1949–1953 | Pennsylvania | Democratic | 1889–1953 | John O'Neill | 1863–1865 | Ohio | Democratic | 1822–1905 | John Joseph O'Neill | 1883–1889 1891–1893 1894–1895 | Missouri | Democratic | 1846–1898 | Tip O'Neill | 1953–1987 | Massachusetts | Democratic | 1912–1994 | Daniel O'Reilly | 1879–1881 | New York | Independent Democrat | 1838–1911 | George F. O'Shaunessy | 1911–1919 | Rhode Island | Democratic | 1868–1934 | Eugene D. O'Sullivan | 1949–1951 | Nebraska | Democratic | 1883–1968 | Patrick B. O'Sullivan | 1923–1925 | Connecticut | Democratic | 1887–1978 | Donald L. O'Toole | 1937–1953 | New York | Democratic | 1902–1964 | Mary Rose Oakar | 1977–1993 | Ohio | Democratic | 1940– | P. Davis Oakey | 1915–1917 | Connecticut | Republican | 1861–1920 | Thomas Jackson Oakley | 1813–1815 | New York | Federalist | 1783–1857 | Thomas Jackson Oakley | 1827–1828 | New York | Democratic | 1783–1857 | Charles G. Oakman | 1953–1955 | Michigan | Republican | 1903–1973 | William C. Oates | 1881–1894 | Alabama | Democratic | 1835–1910 | James Oberstar | 1975–2011 | Minnesota | Democratic | 1934– | Dave Obey | 1969–2011 | Wisconsin | Democratic | 1934– | Thomas P. Ochiltree | 1883–1885 | Texas | Independent | 1837–1902 | Benjamin Barker Odell, Jr. | 1895–1899 | New York | Republican | 1854–1926 | Moses F. Odell | 1861–1865 | New York | Democratic | 1818–1866 | N. Holmes Odell | 1875–1877 | New York | Democratic | 1828–1904 | Charles F. Ogden | 1919–1923 | Kentucky | Republican | 1873–1933 | David A. Ogden | 1817–1819 | New York | Federalist | 1770–1829 | Henry W. Ogden | 1894–1899 | Louisiana | Democratic | 1842–1905 | Alexander Ogle | 1817–1819 | Pennsylvania | Democratic-Republican | 1766–1832 | Andrew Jackson Ogle | 1849–1851 | Pennsylvania | Whig | 1822–1852 | Charles Ogle | 1837–1841 | Pennsylvania | Anti-Masonic | 1798–1841 | Charles Ogle | 1841 | Pennsylvania | Whig | 1798–1841 | Woodson R. Oglesby | 1913–1917 | New York | Democratic | 1867–1955 | Lewis P. Ohliger | 1892–1893 | Ohio | Democratic | 1843–1923 | J. Van Vechten Olcott | 1905–1911 | New York | Republican | 1856–1940 | Pearl Peden Oldfield | 1929–1931 | Arkansas | Democratic | 1876–1962 | William Allan Oldfield | 1909–1928 | Arkansas | Democratic | 1874–1928 | Edson B. Olds | 1849–1855 | Ohio | Democratic | 1802–1869 | Abram B. Olin | 1857–1863 | New York | Republican | 1808–1879 | Gideon Olin | 1803–1807 | Vermont | Democratic-Republican | 1743–1823 | Henry Olin | 1824–1825 | Vermont | National Republican | 1768–1837 | Jim Olin | 1983–1993 | Virginia | Democratic | 1920–2006 | Andrew Oliver | 1853–1857 | New York | Democratic | 1815–1889 | Daniel C. Oliver | 1917–1919 | New York | Democratic | 1865–1924 | Frank A. Oliver | 1923–1934 | New York | Democratic | 1883–1968 | James C. Oliver | 1937–1943 | Maine | Republican | 1895–1986 | James C. Oliver | 1959–1961 | Maine | Democratic | 1895–1986 | Mordecai Oliver | 1853–1855 | Missouri | Whig | 1819–1898 | Mordecai Oliver | 1855–1857 | Missouri | Oppositionist | 1819–1898 | S. Addison Oliver | 1875–1879 | Iowa | Republican | 1833–1912 | William Bacon Oliver | 1915–1937 | Alabama | Democratic | 1867–1948 | William M. Oliver | 1841–1843 | New York | Democratic | 1792–1863 | Marlin Edgar Olmsted | 1897–1913 | Pennsylvania | Republican | 1847–1913 | Richard Olney II | 1915–1921 | Massachusetts | Democratic | 1871–1939 | Archibald E. Olpp | 1921–1923 | New Jersey | Republican | 1882–1949 | Arnold Olsen | 1961–1971 | Montana | Democratic | 1916–1990 | Alec G. Olson | 1963–1967 | Minnesota | Democratic-Farmer-Labor | 1930– | Stephen Ormsby | 1811–1813 1813–1817 | Kentucky | Democratic-Republican | 1759–1844 | Alexander D. Orr | 1792–1795 | Kentucky | Anti-Administration | 1761–1835 | Alexander D. Orr | 1795–1797 | Kentucky | Democratic-Republican | 1761–1835 | Benjamin Orr | 1817–1819 | Massachusetts | Federalist | 1772–1828 | Jackson Orr | 1871–1875 | Iowa | Republican | 1832–1926 | James Lawrence Orr | 1849–1859 | South Carolina | Democratic | 1822–1873 | Robert Orr, Jr. | 1825–1829 | Pennsylvania | Democratic | 1786–1876 | Godlove Stein Orth | 1863–1871 1873–1875 1879–1882 | Indiana | Republican | 1817–1882 | Solomon Ortiz | 1983–2011 | Texas | Democratic | 1937– | Bill Orton | 1991–1997 | Utah | Democratic | 1948–2009 | Edwin Sylvanus Osborne | 1885–1891 | Pennsylvania | Republican | 1839–1900 | Henry Z. Osborne | 1917–1923 | California | Republican | 1848–1923 | John Eugene Osborne | 1897–1899 | Wyoming | Democratic | 1858–1943 | Thomas B. Osborne | 1839–1843 | Connecticut | Whig | 1798–1869 | Tom Osborne | 2001–2007 | Nebraska | Republican | 1937– | Doug Ose | 1999–2005 | California | Republican | 1955– | Gayton P. Osgood | 1833–1835 | Massachusetts | Democratic | 1797–1861 | James H. Osmer | 1879–1881 | Pennsylvania | Republican | 1832–1912 | Frank C. Osmers, Jr. | 1939–1943 1951–1965 | New Jersey | Republican | 1907–1977 | Harold C. Ostertag | 1951–1965 | New York | Republican | 1896–1985 | Peter J. Otey | 1895–1902 | Virginia | Democratic | 1840–1902 | Harrison Gray Otis | 1797–1801 | Massachusetts | Federalist | 1765–1848 | John Otis | 1849–1851 | Maine | Whig | 1801–1856 | John G. Otis | 1891–1893 | Kansas | Populist | 1838–1916 | Norton P. Otis | 1903–1905 | New York | Republican | 1840–1905 | Theobald Otjen | 1895–1907 | Wisconsin | Republican | 1851–1924 | Butch Otter | 2001–2007 | Idaho | Republican | 1942– | Richard Ottinger | 1965–1971 1975–1985 | New York | Democratic | 1929– | Joseph H. Outhwaite | 1885–1895 | Ohio | Democratic | 1841–1907 | George E. Outland | 1943–1947 | California | Democratic | 1906–1981 | David Outlaw | 1847–1853 | North Carolina | Whig | 1806–1868 | George Outlaw | 1825 | North Carolina | Democratic-Republican | 1731–1825 | Arthur W. Overmyer | 1915–1919 | Ohio | Democratic | 1879–1952 | James Overstreet | 1819–1822 | South Carolina | Democratic-Republican | 1773–1822 | James W. Overstreet | 1906–1907 1917–1923 | Georgia | Democratic | 1866–1938 | Jesse Overstreet | 1895–1909 | Indiana | Republican | 1859–1910 | Edward Overton, Jr. | 1877–1881 | Pennsylvania | Republican | 1836–1903 | John H. Overton | 1931–1933 | Louisiana | Democratic | 1875–1948 | Walter Hampden Overton | 1829–1831 | Louisiana | Democratic | 1788–1845 | Allen Ferdinand Owen | 1849–1851 | Georgia | Whig | 1816–1865 | Emmett Marshall Owen | 1933–1939 | Georgia | Democratic | 1877–1939 | George Washington Owen | 1823–1825 | Alabama | Democratic-Republican | 1796–1837 | George Washington Owen | 1825–1829 | Alabama | Democratic | 1796–1837 | James Owen | 1817–1819 | North Carolina | Democratic-Republican | 1784–1865 | Robert Dale Owen | 1843–1847 | Indiana | Democratic | 1801–1877 | Ruth Bryan Owen | 1929–1933 | Florida | Democratic | 1885–1954 | William D. Owen | 1885–1891 | Indiana | Republican | 1846–1906 | George Welshman Owens | 1835–1839 | Georgia | Democratic | 1786–1856 | James W. Owens | 1889–1893 | Ohio | Democratic | 1837–1900 | Major Owens | 1983–2007 | New York | Democratic | 1936– | Thomas L. Owens | 1947–1948 | Illinois | Republican | 1897–1948 | Wayne Owens | 1973–1975 1987–1993 | Utah | Democratic | 1937–2002 | William Claiborne Owens | 1895–1896 | Kentucky | Democratic | 1849–1925 | William Claiborne Owens | 1896–1897 | Kentucky | Republican | 1849–1925 | Bryan Owsley | 1841–1843 | Kentucky | Whig | 1798–1849 | Mike Oxley | 1981–2007 | Ohio | Republican | 1944–