Political party strength in U.S. states is the level of representation of the various political parties in the United States in each statewide elective office providing legislators to the state and to the U.S. Congress and electing the executives at the state and national level.
The 2012 United States elections took place on November 6, 2012. Democratic President Barack Obama won reelection to a second term and the Democrats gained seats in both chambers of Congress, retaining control of the Senate even though the Republican Party retained control of the House of Representatives. As of 2024, this is the most recent election cycle in which neither the presidency nor a chamber of Congress changed partisan control, and the last time that the party that won the presidency simultaneously gained seats in both the House of Representatives and the Senate.
The 2010 United States state legislative elections were held on November 2, 2010, halfway through President Barack Obama's first term in office. Elections were held for 88 legislative chambers, with all states but Louisiana, Mississippi, New Jersey, and Virginia holding elections in at least one house. Kansas and New Mexico held elections for their lower, but not upper houses. Four territorial chambers in three territories and the District of Columbia were up as well.
The 2018 United States elections were held on Tuesday, November 6, 2018. These midterm elections occurred during Incumbent Republican President Donald Trump's first term. Although the Republican Party increased its majority in the Senate, unified Republican control of Congress and the White House was brought to an end when the Democratic Party won control of the House of Representatives in what was widely characterized as a "blue wave" election as Democrats also gained governorships, other statewide offices, and state legislative chambers.
The 2020 United States state legislative elections were held on November 3, 2020, for 86 state legislative chambers in 44 states. Across the fifty states, approximately 65 percent of all upper house seats and 85 percent of all lower house seats were up for election. Nine legislative chambers in the five permanently-inhabited U.S. territories and the federal district of Washington, D.C. also held elections. The elections took place concurrently with several other federal, state, and local elections, including the presidential election, U.S. Senate elections, U.S. House elections, and gubernatorial elections.
The 2018 United States state legislative elections were held on November 6, 2018, for 87 state legislative chambers in 46 states. Across the fifty states, approximately 56 percent of all upper house seats and 92 percent of all lower house seats were up for election. Additionally, six territorial chambers in four territories and the District of Columbia were up as well.
The 2022 United States state legislative elections were held on November 8, 2022, for 88 state legislative chambers in 46 states. Across the fifty states, approximately 56 percent of all upper house seats and 92 percent of all lower house seats were up for election. Additionally, six territorial chambers were up in four territories and the District of Columbia. These midterm elections coincided with other state and local elections, including gubernatorial elections in multiple states.
Elections to state legislatures were held in 46 U.S. states in 2014 with a total of 6,049 seats up for election. Six territorial chambers were up in four territories and the District of Columbia.
The 2017 United States state legislative elections were held on November 7, 2017. Three legislative chambers in two states held regularly scheduled elections. These off-year elections coincided with other state and local elections, including gubernatorial elections in two states.
The 2015 United States state legislative elections were held on November 3, 2015. Seven legislative chambers in four states held regularly scheduled elections. These off-year elections coincided with other state and local elections, including gubernatorial elections in three states.
The 2013 United States state legislative elections were held on November 5, 2013. Three legislative chambers in two states held regularly-scheduled elections. These off-year elections coincided with other state and local elections, including gubernatorial elections in two states.
The 2011 United States state legislative elections were held on November 8, 2011. Eight legislative chambers in four states held regularly scheduled elections. These off-year elections coincided with other state and local elections, including gubernatorial elections in four states.
The 2016 United States state legislative elections were held on November 8, 2016, for 86 state legislative chambers in 44 states. Across the fifty states, approximately 65 percent of all upper house seats and 85 percent of all lower house seats were up for election. Nine legislative chambers in the five permanently-inhabited U.S. territories and the federal district of Washington, D.C. also held elections. The elections took place concurrently with several other federal, state, and local elections, including the presidential election, U.S. Senate elections, U.S. House elections, and gubernatorial elections.
The 2012 United States state legislative elections were held on November 6, 2012, for 86 state legislative chambers in 44 states. Across the fifty states, approximately 65 percent of all upper house seats and 85 percent of all lower house seats were up for election. Nine legislative chambers in the five permanently-inhabited U.S. territories and the federal district of Washington, D.C. also held elections. The elections took place concurrently with several other federal, state, and local elections, including the presidential election, U.S. Senate elections, U.S. House elections, and gubernatorial elections.
Elections to state legislatures were held on November 4, 2008, alongside other elections, in which Democrats scored significant gains in a blue wave election. Elections were held for 85 legislative chambers, with all states but Louisiana, Mississippi, New Jersey, Alabama, Maryland, and Virginia holding elections in at least one house. Michigan and Minnesota held elections for their lower, but not upper houses. Seven territorial chambers in four territories and the District of Columbia were up.
The 2006 United States state legislative elections were held on November 7, 2006, halfway through President George W. Bush's second term in office. This election was a wave elections in the United States election, and saw Democrats simultaneously reclaim both houses of Congress and pick up six governorships. Elections were held for 90 legislative chambers, with all states but Louisiana, Mississippi, New Jersey, and Virginia holding elections in at least one house. Kansas, New Mexico, and South Carolina held elections for their lower, but not upper house. Four territorial chambers in three territories and the District of Columbia were up, including the newly created territorial legislature in the U.S. Virgin Islands.
The 2002 United States state legislative elections were held on November 5, 2002, halfway through President George W. Bush's first term in office. This was a unique election in which the incumbent Republican party performed surprisingly well for a midterm election. Elections were held for 91 legislative chambers, with all states but Louisiana, Mississippi, New Jersey, and Virginia holding elections in at least one house. Three territorial chambers in two territories and the District of Columbia were up as well.
Elections to state legislatures were held on November 7, 2000, simultaneously with the 2000 United States presidential election. Elections were held for 86 legislative chambers in 44 states, simultaneous to those states' gubernatorial elections. Election occurred in both chambers of each state's legislature, except for Alabama, Louisiana, Maryland, Mississippi, New Jersey, and Virginia. Michigan held elections for the lower house. Six territorial chambers in four territories and the District of Columbia were up as well. These elections determined the redistricting process after the 2000 census.
The 2024 United States state legislative elections were held on November 5, 2024, for 85 state legislative chambers in 44 states. Across the fifty states, approximately 65 percent of all upper house seats and 85 percent of all lower house seats were up for election. Nine legislative chambers in the five permanently inhabited U.S. territories and the federal district of Washington, D.C., also held elections. The elections take place concurrently with several other federal, state, and local elections, including the presidential election, U.S. Senate elections, U.S. House elections, and gubernatorial elections.
The 2025 United States state legislative elections will be held on November 4, 2025, for 2 state legislative chambers in 2 states. Across the fifty states, 3 percent of all lower house seats will be up for election, with no upper house having regularly scheduled elections. The elections take place concurrently with several other state and local elections, including the gubernatorial elections.
