The following table shows regularly scheduled United States Senate elections by region. The table does not include appointments or special elections.

Legend Label Party Label Party Label Party Label Party Label Party PA Pro-Administration Faction AJ Anti-Jacksonian FS Free Soil Party SR Silver Republican Party — No regularly scheduled election AA Anti-Administration Faction D Democratic Party A American Party FL Farmer-Labor Party I Independent F Federalist Party R Republican Party Po Populist Party Sp Split resultCandidates from two different parties were elected. This occasionally occurred when a state delegation was first admitted or re-admitted to the Senate. Unless otherwise noted, the split was between the Republican and Democratic parties. DR Democratic-Republican Party Nu Nullifier Party U UnionIncludes members of the Unconditional Union Party and other candidates elected under the "Union" label. J Jacksonites W Whig Party Ra Readjuster Party

Northeast

First Party System Second Party System Third Party System Fourth Party System Fifth Party System Sixth Party SystemThere is no consensus definition for the beginning or ending date of the Sixth Party System. State 1789 1789 1790 1792 1794 1796 1798 1800 1802 1804 1806 1808 1810 1812 1814 1816 1818 1820 1822 1824 1826 State 1828 1830 1832 1834 1836 1838 1840 1842 1844 1846 1848 1850 1852 1854 State 1856 1858 1860 1862 1864 1866 1868 1870 1872 1874 1876 1878 1880 1882 1884 1886 1888 1890 1892 1894 State 1896 1898 1900 1902 1904 1906 1908 1910 1912 1914 1916 1918 1920 1922 1924 1926 1928 1930 State 1932 1934 1936 1938 1940 1942 1944 1946 1948 1950 1952 1954 1956 1958 1960 1962 1964 1966 State 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 State Connecticut PA PA PA — F F — F F — F F — F F — DR DR — AJ AJ Connecticut — AJ AJ — D W — D W — W D — R Connecticut R — R R — R R — LR D — R R — R R — R R — Connecticut R R — R R — R R — R R — R R — R R — Connecticut D D — R D — D R — D R — R D — D D — Connecticut D R — D R — D R — D D — D D — D D — D I — D D — D D — Connecticut Maine Part of Massachusetts Part of Massachusetts 2DR DR — J Maine AJ — D D — D W — D D — D W — Maine D R — R R — R R — R R — R R — R R — R R Maine — R R — R R — D R — R R — R R — R R Maine — R R — R R — R R — R R — D R — D R Maine — D D — D R — D R — D R — R R — R R — R R — I R — I R Maine Massachusetts PA PA PA PA — F F — F F — F DR — F F — F F — AJ Massachusetts AJ — AJ W — W W — W W — FS W — Massachusetts R R — R R — R R — R R — R R — R R — R R Massachusetts — R R — R R — R R — R D — R R — D D Massachusetts — D R — D R — R R — D R — D R — D R Massachusetts — D R — D D — D D — D D — D D — D D — D D — D D — D D Massachusetts New Hampshire AA AA — PA DR — F F — DR DR — DR F — DR DR — DR J — New Hampshire AJ D — D D — D D — FS D — D R New Hampshire — R R — R R — R R — R R — R R — R R — R New Hampshire R — R R — R R — D R — R R — R R — R New Hampshire D — R R — R R — R R — R R — R R — D New Hampshire R — D D — R R — R R — R R — R R — R R — D R — D D — D New Hampshire New Jersey PA PA F F — F F — DR DR — DR DR — DR DR — DR DR — AJ New Jersey AJ — AJ D — W W — W W — D D — New Jersey D R — D D — D R — D D — R D — D D — D R New Jersey — R R — R R — D D — R R — D R — R R New Jersey — D D — R R — R R — R R — D R — D R New Jersey — D R — D D — D D — D D — D D — D D — D D — D D — D D New Jersey New York PA PA AA — F F — DR DR — DR DR — F DR — F DR — AJ J New York — D D — D D — D W — W W — R New York R — R R — R R — R D — R R — R R — D D — New York R R — R R — R D — R R — R D — D D — New York D D — D D — D R — D R — R R — R D — New York R C — R D — R D — R D — R D — D D — D D — D D — D D — New York Pennsylvania AA PA AA — F F — DR DR — DR DR — DR DR — DR DR — AJ J Pennsylvania — D D — D D — D D — W D — D Pennsylvania R — R D — R R — R D — R R — R R — R R — Pennsylvania R R — R R — R R — R R — R R — R R — Pennsylvania R D — R D — D R — R R — D R — D R — Pennsylvania R R — R R — R R — R R — R R — R R — R D — R D — R D — Pennsylvania Rhode Island PA AA PA PA — F F — DR DR — F DR — F F — DR DR — AJ Rhode Island AJ — AJ W — W W — W W — D D — Rhode Island R R — R R — R R — R R — R R — R R — R R Rhode Island — R R — R R — R R — D R — D R — R R Rhode Island — D D — D D — D D — D D — D D — D D Rhode Island — D D — R D — R D — R D — R D — R D — D D — D D — D D Rhode Island Vermont 2AA — F F — F DR — DR DR — DR F — DR DR — AJ AJ Vermont — AJ AJ — W W — W W — W W — W Vermont R — R R — R R — R R — R R — R R — R R — Vermont R R — R R — R R — R R — R R — R R — Vermont R R — R R — R R — R R — R R — R R — Vermont R R — D R — D R — D R — D R — D R — D I — D I — D I — Vermont State 1st 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th State 21st 22nd 23rd 24th 25th 26th 27th 28th 29th 30th 31st 32nd 33rd 34th State 35th 36th 37th 38th 39th 40th 41st 42nd 43rd 44th 45th 46th 47th 48th 49th 50th 51st 52nd 53rd 54th State 55th 56th 57th 58th 59th 60th 61st 62nd 63rd 64th 65th 66th 67th 68th 69th 70th 71st 72nd State 73rd 74th 75th 76th 77th 78th 79th 80th 81st 82nd 83rd 84th 85th 86th 87th 88th 89th 90th State 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd 103rd 104th 105th 106th 107th 108th 109th 110th 111th 112th 113th 114th 115th 116th 117th State

South

First Party System Second Party System Third Party System Civil War and Reconstruction Third Party System Fourth Party System Fifth Party System Sixth Party System State 1789 1789 1790 1792 1794 1796 1798 1800 1802 1804 1806 1808 1810 1812 1814 1816 1818 1820 1822 1824 1826 State 1828 1830 1832 1834 1836 1838 1840 1842 1844 1846 1848 1850 1852 1854 State 1856 1858 1860 1862 1864 1866 1868 1870 1872 1874 1876 1878 1880 1882 1884 1886 1888 1890 1892 1894 State 1896 1898 1900 1902 1904 1906 1908 1910 1912 1914 1916 1918 1920 1922 1924 1926 1928 1930 State 1932 1934 1936 1938 1940 1942 1944 1946 1948 1950 1952 1954 1956 1958 1960 1962 1964 1966 State 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 State Alabama 2DR — DR J — Alabama D D — D D — D D — D D — D D Alabama — D — — — — 2R D R — D D — D D — D D — D Alabama D — D D — D D — D D — D D — D D — D Alabama D — D D — D D — D D — D D — D D — D Alabama D — D D — D R — D D — D D — R R — R R — R R — R R — R Alabama Arkansas Arkansas 2D — D D — D D — D D Arkansas — D D — — — 2R R R — D D — D D — D D — D Arkansas D — D D — D D — D D — D D — D D — D Arkansas D — D D — D D — D D — D D — D D — D Arkansas D — D D — D D — D D — D D — R D — D D — D R — R R — R Arkansas Delaware PA AA PA PA — F F — F F — F F — F F — F F — J Delaware AJ — AJ W — W W — W W — D W — Delaware D D — D D — D D — D D — D D — D R — D D Delaware — R R — R R — R D — D R — D R — R R Delaware — R D — D R — R D — R D — R R — R R Delaware — R D — R D — R D — R D — R D — D D — D D — D D — D D Delaware Florida Florida 2D — W D — D Florida D — — — — — 2R — R D — D D — D D — D D — Florida D D — D D — D D — D D — D D — D D — Florida D D — D D — D D — D D — D D — D D — Florida R D — D D — R D — D R — D R — D D — R D — R D — R R — Florida Georgia AA AA — AA F — DR DR — DR DR — DR DR — DR DR — DR J — Georgia D D — D D — W D — W W — D D Georgia — D — — — R — D D — D D — D D — D D — D Georgia D — D D — D D — D D — D D — D D — D Georgia D — D D — D D — D D — D D — D D — D Georgia D — D D — D R — D D — D R — D R — R R — R R — R R — Georgia Kentucky Part of Virginia 2AA F — DR DR — DR DR — DR DR — DR DR — DR J — Kentucky D AJ — W W — W W — W W — W W Kentucky — D D — D D — D D — D D — D D — D D — D Kentucky R — D D — D R — D D — D R — R D — D Kentucky D — D D — D D — D D — D R — R R — R Kentucky R — D D — D D — R D — R D — R R — R R — R R — R R — R Kentucky Louisiana 2DR — DR DR — DR AJ — Louisiana D D — D D — W W — D D — W D Louisiana — D — — — — 2R R D — R D — D D — D D — D Louisiana D — D D — D D — D D — D D — D D — D Louisiana D — D D — D D — D D — D D — D D — D Louisiana D — D D — D D — D D — D D — D D — D R — D R — R R — R Louisiana Maryland PA PA PA — F F — DR DR — DR DR — F F — DR DR — J J Maryland — AJ AJ — W W — W W — W W — W Maryland A — D U — D D — D D — D D — D D — D D — Maryland R R — D D — D D — D R — R D — D R — Maryland D D — D D — D D — R R — R R — D D — Maryland R R — R D — R D — D D — D D — D D — D D — D D — D D — Maryland Mississippi 2DR — DR DR — J Mississippi D — AJ D — W D — D D — D D — Mississippi D D — — — — — 2R — R D — D D — D D — D D Mississippi — D D — D D — D D — D D — D D — D D Mississippi — D D — D D — D D — D D — D D — D D Mississippi — D D — D R — D R — R R — R R — R R — R R — R R — R R Mississippi North Carolina PA PA — AA DR — DR DR — DR DR — DR DR — DR DR — DR J — North Carolina D D — D D — W D — W W — D D North Carolina — D D — — — 2R D D — D D — D D — D D — Po North Carolina R — D D — D D — D D — D D — D D — D North Carolina D — D D — D D — D D — D D — D D — D North Carolina D — R D — R R — R D — R R — R D — R R — D R — R R — R North Carolina Oklahoma Oklahoma Oklahoma Oklahoma 2D D — D D — D R — R D — D Oklahoma D — D D — R D — D D — D D — D D — D Oklahoma R — R R — D R — D R — D R — R R — R R — R R — R R — R Oklahoma South Carolina PA PA — AA F — DR DR — DR DR — DR DR — DR DR — DR J — South Carolina D Nu — Nu W — D D — D D — D D South Carolina — D — — — — 2R R R — D D — D D — D D — D South Carolina D — D D — D D — D D — D D — D D — D South Carolina D — D D — D D — D D — D D — D D — R South Carolina D — R D — R D — R D — R D — R D — R R — R R — R R — R South Carolina Tennessee 2DR DR — DR DR — DR DR — DR DR — DR DR — J Tennessee D — D W — D W — D W — W W — Tennessee D D — — — Sp R D — D D — D D — D D — D D Tennessee — D D — D D — D D — D D — D D — D D Tennessee — D D — D D — D D — D D — D D — D R Tennessee — R R — D R — D D — D D — R R — R R — R R — R R — R R Tennessee Texas Texas 2D — D D — Texas D D — — — — — 2R — D D — D D — D D — D D Texas — D D — D D — D D — D D — D D — D D Texas — D D — D D — D D — D D — D D — D R Texas — D R — D R — D R — D R — R R — R R — R R — R R — R R Texas Virginia AA AA AA AA — DR DR — DR DR — DR DR — DR DR — DR DR — J Virginia D — AJ W — W W — D D — D D — Virginia D D — UElected by the Restored Government of Virginia. NThe Virginia legislature elected two Unionists in 1865, but the Senate refused to seat either candidate. — — Sp — D D — Ra Ra — D D — D D Virginia — D D — D D — D D — D D — D D — D D Virginia — D D — D D — D D — D D — D D — D D Virginia — I R — I R — R R — D R — D R — R R — D D — D D — D D Virginia West Virginia Part of Virginia Part of Virginia West Virginia Part of Virginia West Virginia 2U R — R D — D D — D D — D D — D R West Virginia — R R — R R — D R — R R — D R — R D West Virginia — D D — D R — D D — D D — D D — D D West Virginia — D D — D D — D D — D D — D D — D D — D D — D R — D R West Virginia State 1st 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th State 21st 22nd 23rd 24th 25th 26th 27th 28th 29th 30th 31st 32nd 33rd 34th State 35th 36th 37th 38th 39th 40th 41st 42nd 43rd 44th 45th 46th 47th 48th 49th 50th 51st 52nd 53rd 54th State 55th 56th 57th 58th 59th 60th 61st 62nd 63rd 64th 65th 66th 67th 68th 69th 70th 71st 72nd State 73rd 74th 75th 76th 77th 78th 79th 80th 81st 82nd 83rd 84th 85th 86th 87th 88th 89th 90th State 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd 103rd 104th 105th 106th 107th 108th 109th 110th 111th 112th 113th 114th 115th 116th 117th State

Midwest