Tens of thousands of elections took place in 2018 across the United States, including primary and general elections at the federal, state, and local levels. Within these elections, there were a variety of different trends and patterns that relayed a certain level of political significance. In 2018, we identified and followed a series of narratives—big picture stories—up-and-down the ballot and across the country throughout the year. This page presents Ballotpedia's research and curation on the 2018 elections in the United States.
Federal politics All 435 U.S. House seats and 33 U.S. Senate seats were up for regular elections in the 2018 midterms. Heading into the election, the Republican Party held a majority in both chambers.
All federal elections :Ballotpedia's 2018 Candidate Connection report United States Congress elections, 2018 Ballotpedia's Top 15 elections to watch, 2018 Special elections to the 115th United States Congress (2017-2018) List of candidates who ran in U.S. Congress elections, 2018 List of U.S. Congress incumbents who did not run for re-election in 2018 Annual Congressional Competitiveness Report, 2018 Margin of victory analysis for the 2018 congressional elections Incumbents defeated in 2018 congressional elections Incumbent win rates by state New members elected in 2018 congressional elections Comparison of state delegations to the 115th and 116th Congresses Congressional elections decided by 10 percent or less, 2018 Results of federal elected officials seeking other offices, 2018 Noteworthy minor party candidates in the 2018 elections PredictIt markets in the 2018 elections Fundraising in Congressional elections, 2018 Battleground election polls, 2018 Timeline of events impacting 2018 congressional elections Media coverage of United States Congress elections, 2018 U.S. Senate elections :U.S. Senate battlegrounds, 2018 United States Senate elections, 2018 Control of the U.S. Senate States with both gubernatorial and U.S. Senate elections in 2018 U.S. House elections :U.S. House battlegrounds, 2018 United States House of Representatives elections, 2018 Control of the U.S. House U.S. House districts represented by a Republican and won by Hillary Clinton in 2016 U.S. House districts represented by a Democrat and won by Donald Trump in 2016 U.S. House elections without a Democratic or Republican candidate, 2018
State politics In November 2018, seats in 87 of 99 state legislative chambers, plus 36 gubernatorial seats, 30 lieutenant gubernatorial seats, 30 attorney general seats, and 27 secretary of state seats were up for election.
All state elections :Ballotpedia's 2018 Candidate Connection report Ballotpedia's Top 15 elections to watch, 2018 State government trifectas Trifecta vulnerability in the 2018 elections Veto-proof state legislatures and opposing party governors in the 2018 elections Noteworthy minor party candidates in the 2018 elections 2018 election analysis: Incumbent win rates by state Results of state elected officials seeking other offices, 2018 Split-ticket voting in statewide elections in 2018 and 2020 State legislative elections :State legislative elections, 2018 State legislative battleground chambers, 2018 Number of state legislators by party Annual State Legislative Competitiveness Report: Vol. 8, 2018 Open seats in the 2018 state legislative elections Impact of term limits on state executive elections in 2018 Partisan balance of state legislative chambers Incumbents defeated in 2018's state legislative elections State legislative supermajorities State legislative chambers where Democrats lost seats, 2018 State legislative chambers where Democrats gained seats, 2018 State legislative chambers where Republicans gained seats, 2018 State legislative chambers where Republicans lost seats, 2018 Margins of victory Races decided by fewer than 100 votes State legislative seats flipped State executive elections :State executive official elections, 2018 2018 ballot measures Annual State Executive Competitiveness Report, 2018 Gubernatorial elections, 2018 Partisan balance of governors States with both gubernatorial and U.S. Senate elections in 2018 Lieutenant gubernatorial elections, 2018 Attorney General elections, 2018 Secretary of State elections, 2018 State government triplexes PredictIt markets in the 2018 elections Battleground election polls, 2018 Media coverage of state executive elections, 2018 State judicial elections :State judicial elections, 2018
Local elections In 2018, Ballotpedia covered elections for mayor, city council, and all other city officials in the100 largest cities by population in the United States , as well as elections for county officials whose jurisdictions overlapped with those cities.
Wave elections Ballotpedia published an exclusive report that examined the results of the 50 election cycles that occurred between 1918 and 2016—spanning from President Woodrow Wilson's (D) second midterm in 1918 to Trump's first presidential election in 2016. In it, we seek to answer the question, "What constitutes a wave election?"
Primary elections Primary elections took place in all levels of government throughout 2018, beginning with statewide primaries in Texas on March 6, 2018, and concluding with state-level primaries in New York on September 13, 2018.
All primary elections :Democratic Party primaries, 2018 Republican Party primaries, 2018 Ballotpedia's Top 10 primaries, 2018 Democratic Party battleground primaries, 2018 Republican Party battleground primaries, 2018 Primary partisan voter turnout comparison, 2018 v. 2014 Top 10 Closest Primaries: January to June 2018 Federal primary elections :United States Senate Democratic Party primaries, 2018 United States Senate Republican Party primaries, 2018 United States House Democratic Party primaries, 2018 United States House Republican Party primaries, 2018 Democratic Party factional conflict in U.S. House primaries, 2018 Republican Party factional conflict in U.S. House primaries, 2018 2018 primary election competitiveness in federal government State primary elections :Democratic Party gubernatorial primaries, 2018 Republican Party gubernatorial primaries, 2018 State legislative Democratic primaries, 2018 State legislative Republican primaries, 2018 Ballotpedia's Top 50 state legislative primaries, 2018 Democratic Party Attorney General primaries, 2018 Republican Party Attorney General primaries, 2018 Democratic Party Secretary of State primaries, 2018 Republican Party Secretary of State primaries, 2018 2018 primary election competitiveness in state government
Election coverage by office
Election coverage by state Click your state on the map below to navigate to relevant election information.Elections by state and year .
Choose your state... Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington Washington, D.C. West Virginia Wisconsin Wyoming
http://ballotpedia.org/STATE_elections,_2018
Election resources 
