Elections in Missouri

Elections in Missouri are held to fill various local, state and federal seats. Special elections may be held to fill vacancies at other points in time.

In a 2020 study, Missouri was ranked as the 3rd hardest state for citizens to vote in.

Districting
Congressional and legislative districting is performed by legislative committee following the release of the decennial United States census.

Political parties
Missouri performed non-partisan voter registration prior to 2023.

Voter registration
Residents have been allowed to register online to vote or update their registration online since 2014, but only using mobile or touchscreen computers. 17.5-year-old residents may preregister to vote. Starting in 2023, an optional question on voters' party affiliation was added to voter registration forms statewide.

Absentee voting and early voting
Absentee ballots may only be requested with a provided excuse and by mail or fax (with a copy of acceptable photo ID) by the second Wednesday prior to an election. In-person absentee voting is allowed from the second Tuesday prior to an election, with acceptable photo ID required at early voting locations.

Ballot measures
The General Assembly may refer a any measure, including constitutional amendments, to a ballot measure with simple majorities of both houses in a single session. Residents may initiate ballot measures, including referendums and constitutional amendments. Constitutional amendments may be initiated by a minimum number of valid signatures from the equivalent of 8% of votes cast in the last gubernatorial election from each of two-thirds of the state's congressional districts.

Gubernatorial

 * 1820 Missouri gubernatorial election
 * 1824 Missouri gubernatorial election
 * 1825 Missouri gubernatorial special election
 * 1828 Missouri gubernatorial election
 * 1832 Missouri gubernatorial election
 * 1836 Missouri gubernatorial election
 * 1840 Missouri gubernatorial election
 * 1844 Missouri gubernatorial election
 * 1848 Missouri gubernatorial election
 * 1852 Missouri gubernatorial election
 * 1856 Missouri gubernatorial election
 * 1857 Missouri gubernatorial special election
 * 1860 Missouri gubernatorial election
 * 1864 Missouri gubernatorial election
 * 1868 Missouri gubernatorial election
 * 1870 Missouri gubernatorial election
 * 1872 Missouri gubernatorial election
 * 1874 Missouri gubernatorial election
 * 1876 Missouri gubernatorial election
 * 1880 Missouri gubernatorial election
 * 1884 Missouri gubernatorial election
 * 1888 Missouri gubernatorial election
 * 1892 Missouri gubernatorial election
 * 1896 Missouri gubernatorial election
 * 1900 Missouri gubernatorial election
 * 1904 Missouri gubernatorial election
 * 1908 Missouri gubernatorial election
 * 1912 Missouri gubernatorial election
 * 1916 Missouri gubernatorial election
 * 1920 Missouri gubernatorial election
 * 1924 Missouri gubernatorial election
 * 1928 Missouri gubernatorial election
 * 1932 Missouri gubernatorial election
 * 1936 Missouri gubernatorial election
 * 1940 Missouri gubernatorial election
 * 1944 Missouri gubernatorial election
 * 1948 Missouri gubernatorial election
 * 1952 Missouri gubernatorial election
 * 1956 Missouri gubernatorial election
 * 1960 Missouri gubernatorial election
 * 1964 Missouri gubernatorial election
 * 1968 Missouri gubernatorial election
 * 1972 Missouri gubernatorial election
 * 1976 Missouri gubernatorial election
 * 1980 Missouri gubernatorial election
 * 1984 Missouri gubernatorial election
 * 1988 Missouri gubernatorial election
 * 1992 Missouri gubernatorial election
 * 1996 Missouri gubernatorial election
 * 2000 Missouri gubernatorial election
 * 2004 Missouri gubernatorial election
 * 2008 Missouri gubernatorial election
 * 2012 Missouri gubernatorial election
 * 2016 Missouri gubernatorial election
 * 2020 Missouri gubernatorial election
 * 2024 Missouri gubernatorial election

Presidential

 * 1820 United States presidential election in Missouri
 * 1824 United States presidential election in Missouri
 * 1828 United States presidential election in Missouri
 * 1832 United States presidential election in Missouri
 * 1836 United States presidential election in Missouri
 * 1840 United States presidential election in Missouri
 * 1844 United States presidential election in Missouri
 * 1848 United States presidential election in Missouri
 * 1852 United States presidential election in Missouri
 * 1856 United States presidential election in Missouri
 * 1860 United States presidential election in Missouri
 * 1864 United States presidential election in Missouri
 * 1868 United States presidential election in Missouri
 * 1872 United States presidential election in Missouri
 * 1876 United States presidential election in Missouri
 * 1880 United States presidential election in Missouri
 * 1884 United States presidential election in Missouri
 * 1888 United States presidential election in Missouri
 * 1892 United States presidential election in Missouri
 * 1896 United States presidential election in Missouri
 * 1900 United States presidential election in Missouri
 * 1904 United States presidential election in Missouri
 * 1908 United States presidential election in Missouri
 * 1912 United States presidential election in Missouri
 * 1916 United States presidential election in Missouri
 * 1920 United States presidential election in Missouri
 * 1924 United States presidential election in Missouri
 * 1928 United States presidential election in Missouri
 * 1932 United States presidential election in Missouri
 * 1936 United States presidential election in Missouri
 * 1940 United States presidential election in Missouri
 * 1944 United States presidential election in Missouri
 * 1948 United States presidential election in Missouri
 * 1952 United States presidential election in Missouri
 * 1956 United States presidential election in Missouri
 * 1960 United States presidential election in Missouri
 * 1964 United States presidential election in Missouri
 * 1968 United States presidential election in Missouri
 * 1972 United States presidential election in Missouri
 * 1976 United States presidential election in Missouri
 * 1980 United States presidential election in Missouri
 * 1984 United States presidential election in Missouri
 * 1988 United States presidential election in Missouri
 * 1992 United States presidential election in Missouri
 * 1996 United States presidential election in Missouri
 * 2000 United States presidential election in Missouri
 * 2004 United States presidential election in Missouri
 * 2008 United States presidential election in Missouri
 * 2012 United States presidential election in Missouri
 * 2016 United States presidential election in Missouri
 * 2020 United States presidential election in Missouri
 * 2024 United States presidential election in Missouri