# List of United States Senate election results by region

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 result |
| DR | Democratic-Republican Party | Nu | Nullifier Party | U | Union | | |
| J | Jacksonites | W | Whig Party | Ra | Readjuster Party | | |

## Northeast

| | | | | | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | | | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth 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 |
| 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 | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | Part of Massachusetts | 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 | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | | | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Third Party System | Third Party System | Third Party System | Civil War and Reconstruction | Civil War and Reconstruction | Civil War and Reconstruction | Civil War and Reconstruction | Civil War and Reconstruction | Civil War and Reconstruction | Civil War and Reconstruction | Civil War and Reconstruction | Civil War and Reconstruction | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth 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 | Part of Virginia | 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 | — | U | N | — | — | 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 | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | | | West Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of Virginia | Part of 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

| First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | First Party System | | | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Second Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System |
| State | 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 |
| Illinois | | | | | | | | | 2DR | — | DR | J | — | Illinois | D | D | — | D | D | — | D | D | — | D | D | — | D | D | Illinois | — | D | R | — | R | R | — | R | R | — | I | R | — | R | R | — | R | D | — | R | Illinois | R | — | R | R | — | R | R | — | D | R | — | R | R | — | R | R | — | D | Illinois | D | — | D | D | — | R | D | — | D | R | — | D | R | — | D | R | — | R | Illinois | R | — | R | D | — | R | D | — | D | D | — | D | D | — | D | R | — | D | D | — | D | R | — | D | D | — | D | Illinois |
| Indiana | | | | | | | | 2DR | DR | DR | — | AJ | AJ | Indiana | — | AJ | D | — | W | W | — | D | D | — | D | D | — | D | Indiana | D | — | R | D | — | R | R | — | R | D | — | D | R | — | D | D | — | D | D | — | Indiana | R | R | — | R | R | — | D | D | — | D | R | — | R | D | — | R | R | — | Indiana | D | D | — | D | R | — | R | R | — | R | R | — | R | D | — | D | D | — | Indiana | D | D | — | D | R | — | R | R | — | R | R | — | R | R | — | D | R | — | D | R | — | R | D | — | R | R | — | Indiana |
| Iowa | | | | | | | | | | | | | | Iowa | | | | | | | | | | | 2D | — | D | FS | Iowa | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | Iowa | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | Iowa | D | — | D | D | — | R | R | — | D | R | — | R | R | — | R | R | — | R | Iowa | D | — | D | D | — | R | R | — | D | R | — | D | R | — | D | R | — | D | R | — | D | R | — | R | R | — | R | Iowa |
| Kansas | | | | | | | | | | | | | | Kansas | | | | | | | | | | | | | | | Kansas | | | 2R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | Po | — | R | Kansas | Po | — | R | R | — | R | R | — | D | R | — | R | R | — | R | R | — | R | Kansas | D | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | Kansas | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | Kansas |
| Michigan | | | | | | | | | | | | | | Michigan | | | | | 2D | W | | — | D | D | — | D | D | — | Michigan | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | Michigan | — | R | R | — | R | R | — | R | R | — | R | R | — | D | R | — | R | R | Michigan | — | R | D | — | R | R | — | R | R | — | R | D | — | D | D | — | D | R | Michigan | — | D | R | — | D | D | — | D | D | — | D | D | — | R | D | — | D | D | — | D | D | — | D | D | — | D | D | Michigan |
| Minnesota | | | | | | | | | | | | | | Minnesota | | | | | | | | | | | | | | | Minnesota | | Sp | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | Minnesota | — | R | R | — | R | R | — | R | R | — | R | R | — | FL | R | — | FL | R | Minnesota | — | FL | FL | — | R | R | — | R | D | — | R | D | — | D | D | — | D | D | Minnesota | — | D | D | — | D | R | — | R | R | — | R | D | — | R | D | — | D | R | — | D | D | — | D | D | — | D | D | Minnesota |
| Missouri | | | | | | | | | | 2DR | — | AJ | J | Missouri | — | D | D | — | D | D | — | D | D | — | D | W | — | D | Missouri | D | — | D | U | — | R | R | — | D | D | — | D | D | — | D | D | — | D | D | — | Missouri | D | D | — | D | R | — | D | D | — | D | D | — | R | D | — | D | R | — | Missouri | D | D | — | D | D | — | R | R | — | D | D | — | D | D | — | D | D | — | Missouri | D | D | — | D | R | — | D | R | — | R | R | — | R | R | — | R | R | — | R | D | — | R | D | — | R | R | — | Missouri |
| Nebraska | | | | | | | | | | | | | | Nebraska | | | | | | | | | | | | | | | Nebraska | | | | | | 2R | R | R | — | R | R | — | R | R | — | R | R | — | Po | R | Nebraska | — | R | R | — | R | R | — | D | R | — | D | R | — | R | R | — | R | R | Nebraska | — | D | I | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | Nebraska | — | R | R | — | D | D | — | D | D | — | D | D | — | D | R | — | D | R | — | D | R | — | R | R | — | R | R | Nebraska |
| North Dakota | | | | | | | | | | | | | | North Dakota | | | | | | | | | | | | | | | North Dakota | | | | | | | | | | | | | | | | | 2R | R | D | — | North Dakota | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | North Dakota | R | R | — | R | R | — | D | R | — | R | R | — | R | R | — | R | D | — | North Dakota | R | D | — | R | D | — | R | D | — | D | D | — | D | D | — | D | D | — | D | D | — | R | D | — | R | R | — | North Dakota |
| Ohio | 2DR | — | DR | DR | — | DR | DR | — | DR | DR | — | AJ | AJ | Ohio | — | AJ | D | — | D | D | — | D | W | — | FS | W | — | D | Ohio | R | — | R | R | — | R | D | — | R | D | — | D | R | — | D | R | — | D | R | — | Ohio | R | R | — | R | R | — | R | D | — | R | D | — | R | R | — | R | R | — | Ohio | D | D | — | R | R | — | R | R | — | R | R | — | D | D | — | D | D | — | Ohio | R | R | — | D | D | — | D | D | — | D | D | — | D | R | — | R | R | — | R | D | — | R | D | — | R | D | — | Ohio |
| South Dakota | | | | | | | | | | | | | | South Dakota | | | | | | | | | | | | | | | South Dakota | | | | | | | | | | | | | | | | | 2R | I | — | R | South Dakota | Po | — | R | R | — | R | R | — | R | D | — | R | R | — | R | R | — | D | South Dakota | R | — | D | R | — | R | R | — | R | R | — | R | R | — | R | D | — | R | South Dakota | D | — | D | D | — | R | R | — | R | D | — | R | D | — | D | D | — | D | R | — | D | R | — | R | R | — | R | South Dakota |
| Wisconsin | | | | | | | | | | | | | | Wisconsin | | | | | | | | | | | 2D | D | — | R | Wisconsin | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | D | D | — | Wisconsin | R | R | — | R | R | — | R | R | — | D | R | — | R | R | — | R | R | — | Wisconsin | D | Pr | — | R | R | — | R | R | — | R | R | — | R | D | — | D | D | — | Wisconsin | D | D | — | D | D | — | R | D | — | R | D | — | D | D | — | D | D | — | D | D | — | R | D | — | R | D | — | Wisconsin |
| State | 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 |

## West

| Second Party System | Second Party System | Second Party System | Second Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Third Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fourth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Fifth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System | Sixth Party System |
| State | 1850 | 1852 | 1854 | 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 |
| Alaska | | | | | | | | | | | | | | | | | | | | | | | | Alaska | | | | | | | | | | | | | | | | | | | Alaska | | | | | | | | | | | | | | 2D | D | D | — | D | Alaska | D | — | R | D | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | D | R | — | R | R | — | | Alaska |
| Arizona | | | | | | | | | | | | | | | | | | | | | | | | Arizona | | | | | | | | | 2D | D | D | — | R | D | — | D | D | — | Arizona | D | D | — | D | D | — | D | D | — | D | R | — | D | R | — | D | R | — | Arizona | R | R | — | R | D | — | R | D | — | R | D | — | R | R | — | R | R | — | R | R | — | R | R | — | R | D | — | Arizona |
| California | 2D | — | D | D | — | D | R | — | R | D | — | R | AM | — | D | R | — | R | D | — | R | D | — | California | R | R | — | R | R | — | R | R | — | D | R | — | R | R | — | R | R | — | California | D | R | — | D | R | — | D | R | — | R | R | — | R | D | — | R | R | — | California | D | D | — | D | R | — | D | R | — | D | R | — | D | D | — | D | D | — | D | D | — | D | D | — | D | D | — | California |
| Colorado | | | | | | | | | | | | | | 2R | R | — | R | R | — | R | SR | — | R | Colorado | D | — | D | D | — | R | D | — | D | D | — | R | R | — | R | R | — | D | Colorado | D | — | D | D | — | D | R | — | D | R | — | R | D | — | R | R | — | R | Colorado | R | — | D | D | — | R | D | — | R | D | — | R | R | — | R | R | — | R | D | — | D | D | — | R | D | — | D | Colorado |
| Hawaii | | | | | | | | | | | | | | | | | | | | | | | | Hawaii | | | | | | | | | | | | | | | | | | | Hawaii | | | | | | | | | | | | | | Sp | — | R | R | — | Hawaii | D | R | — | D | D | — | D | D | — | D | D | — | D | D | — | D | D | — | D | D | — | D | D | — | D | D | — | Hawaii |
| Idaho | | | | | | | | | | | | | | | | | | | | | 2R | — | R | Idaho | Po | — | SR | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | Idaho | D | — | R | D | — | R | D | — | D | R | — | R | D | — | R | D | — | R | Idaho | D | — | R | D | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | Idaho |
| Montana | | | | | | | | | | | | | | | | | | | | 2R | — | R | R | Montana | — | D | D | — | R | R | — | D | D | — | D | D | — | D | D | — | D | D | Montana | — | D | D | — | D | D | — | R | D | — | D | D | — | D | D | — | D | D | Montana | — | D | D | — | D | D | — | D | D | — | R | D | — | R | D | — | R | D | — | D | D | — | D | R | — | D | R | Montana |
| Nevada | | | | | | | | 2R | R | R | — | R | R | — | R | D | — | R | R | — | R | SR | — | Nevada | Si | SR | — | D | R | — | D | R | — | D | D | — | R | D | — | R | D | — | Nevada | D | D | — | D | D | — | D | R | — | D | R | — | D | D | — | D | D | — | Nevada | D | D | — | R | D | — | R | R | — | D | D | — | D | D | — | D | R | — | D | R | — | D | R | — | D | D | — | Nevada |
| New Mexico | | | | | | | | | | | | | | | | | | | | | | | | New Mexico | | | | | | | | | 2R | — | D | R | — | D | D | — | R | D | New Mexico | — | R | D | — | D | D | — | D | D | — | D | D | — | D | D | — | D | D | New Mexico | — | D | R | — | R | R | — | D | R | — | D | R | — | D | R | — | D | R | — | D | D | — | D | D | — | D | D | New Mexico |
| Oregon | | | | | 2D | R | — | R | R | — | D | R | — | D | D | — | R | R | — | R | R | — | R | Oregon | R | — | R | R | — | R | D | — | D | D | — | R | R | — | R | R | — | R | Oregon | R | — | R | R | — | R | R | — | R | R | — | D | D | — | D | D | — | R | Oregon | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | D | — | R | D | — | D | D | — | D | D | — | D | Oregon |
| Utah | | | | | | | | | | | | | | | | | | | | | | | | Utah | Sp | R | — | R | R | — | R | R | — | R | D | — | R | D | — | R | D | — | Utah | D | D | — | D | D | — | D | R | — | R | R | — | R | D | — | R | D | — | Utah | R | D | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | Utah |
| Washington | | | | | | | | | | | | | | | | | | | | 2R | R | R | — | Washington | R | R | — | R | R | — | R | R | — | R | R | — | R | D | — | R | D | — | Washington | D | D | — | D | D | — | D | R | — | D | D | — | D | D | — | D | D | — | Washington | D | D | — | D | D | — | R | D | — | D | R | — | D | R | — | D | D | — | D | D | — | D | D | — | D | D | — | Washington |
| Wyoming | | | | | | | | | | | | | | | | | | | | | 2R | R | R | Wyoming | — | R | R | — | R | R | — | R | R | — | D | R | — | D | R | — | D | R | Wyoming | — | D | D | — | D | R | — | D | D | — | R | D | — | D | R | — | D | R | Wyoming | — | D | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | — | R | R | Wyoming |
| State | 32nd | 33rd | 34th | 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 |