The 2018 United States Senate elections were held on November 6, 2018. Among the 100 seats, the 33 of Class 1 were contested in regular elections while 2 others were contested in special elections due to Senate vacancies in Minnesota and Mississippi. The regular election winners were elected to 6-year terms running from January 3, 2019, to January 3, 2025. Senate Democrats had 26 seats up for election, while Senate Republicans had 9 seats up for election.
The 2020 United States Senate elections were held on November 3, 2020, with the 33 class 2 seats of the Senate contested in regular elections. Of these, 21 were held by Republicans, and 12 by Democrats. The winners were elected to 6-year terms from January 3, 2021, to January 3, 2027. Two special elections for seats held by Republicans were also held in conjunction with the general elections: one in Arizona, to fill the vacancy created by John McCain's death in 2018; and one in Georgia, following Johnny Isakson's resignation in 2019. These elections ran concurrently with the 2020 United States presidential election in which incumbent president Donald Trump lost to Democratic nominee Joe Biden.
The 2018 United States Senate election in Maine was held on November 6, 2018, alongside a gubernatorial election, U.S. House elections, and other state and local elections. Incumbent independent Senator Angus King won re-election to a second term, defeating Democratic nominee Zak Ringelstein and Republican nominee Eric Brakey. This was one of two independent-held Senate seats up for election in a state that Hillary Clinton won in the 2016 presidential election.
The 2018 Washington State Senate elections took place as part of the biennial United States elections. Washington state voters elected state senators in 25 of the state's 49 Senate districts. The other 24 state senators were not up for re-election until the next biennial election in 2020. State senators serve four-year terms in the Washington State Senate. A statewide map of Washington's state legislative districts is provided by the Washington State Legislature here, Archived 2018-10-24 at the Wayback Machine.
The 2018 Georgia State Senate elections took place as part of the biennial United States elections. Georgia voters elected state senators in all 56 of the state senate's districts. State senators serve two-year terms in the Georgia State Senate.
The 2018 Maine House of Representatives elections took place as part of the biennial United States elections. Maine voters elected state representatives in all 151 of the state house's districts, as well as non-voting members from the Passamaquoddy Tribe and the Houlton Band of Maliseet Indians. State representatives serve two-year terms in the Maine State House.
The 2018 Texas House of Representatives elections took place as part of the biennial United States elections. Texas voters elected state representatives in all 150 of the state house's districts. The winners of this election served in the 86th Texas Legislature. State representatives serve two-year terms in the Texas House. A statewide map of Texas' state House districts can be obtained from the Texas Legislative Council here, and individual district maps can be obtained from the U.S. Census here.
The 2018 Hawaii Senate elections took place as part of the biennial United States elections. Hawaii voters elected state senators in 13 of the state senate's 25 districts. State senators serve four-year terms in the Hawaii Senate.
The 2018 Vermont Senate election took place as part of the biennial United States elections. Vermont voters elected State Senators in all 30 seats. State senators serve two-year terms in the Vermont Senate. A primary election on August 14, 2018, determined which candidates appeared on the November 6 general election ballot.
The 2018 Georgia House of Representatives elections took place as part of the biennial United States elections. Georgia voters elected state representatives in all 180 of the state house's districts. State representatives serve two-year terms in the Georgia House of Representatives.
The 2018 Colorado House of Representatives elections took place as part of the biennial United States elections. Colorado voters elected state representatives in all 65 of the state house's districts. State representatives serve two-year terms in the Colorado House of Representatives. The Colorado Reapportionment Commission provides a statewide map of the state House here, and individual district maps are available from the U.S. Census here.
The 2018 Colorado State Senate elections took place as part of the biennial United States elections. Colorado voters elected state senators in 17 of the 35 districts in the state senate. State senators serve four-year terms in the Colorado State Senate. The Colorado Reapportionment Commission provides a statewide map of the state Senate here, and individual district maps are available from the U.S. Census here.
The 2018 Nebraska State Legislature elections took place as part of the biennial United States elections. Nebraska voters elected state senators in the 24 even-numbered seats of the 49 legislative districts in the Nebraska Unicameral. Nebraska is unique among American| states in that there is only one chamber in its state legislature, and this chamber is called the Unicameral and the State Legislature interchangeably. State senators serve four-year terms in the Nebraska Unicameral.
The 2018 Alabama Senate elections took place on November 3, 2018, as part of the 2018 United States elections. Alabama voters elected state senators in all 35 of the state's Senate districts. State senators serve four-year terms in the Alabama Senate.
The 2018 Nevada Senate election took place as part of the biennial United States elections. Nevada voters elected state senators in 11 of the state senate's 21 districts. State senators serve four-year terms in the Nevada State Senate.
The 2018 Iowa State Senate elections took place as part of the biennial 2018 United States elections. Iowa voters elected state senators in half of the state senate's districts—the 25 odd-numbered state senate districts. State senators serve four-year terms in the Iowa State Senate, with half of the seats up for election each cycle.
The 2004 Iowa State Senate elections took place as part of the biennial 2004 United States elections. Iowa voters elected state senators in half of the state senate's districts—the 25 even-numbered state senate districts. State senators serve four-year terms in the Iowa State Senate, with half of the seats up for election each cycle.
A general election was held in the U.S. state of Maine on November 3, 2020. The office of the Maine Secretary of State oversaw the election process, including voting and vote counting.
The 2020 Vermont Senate elections took place as part of the biennial United States elections. Vermont voters elected all 30 state senators from 13 districts, with each district electing between one and six senators. State senators serve two-year terms in the Vermont Senate. A primary election on August 11, 2020, determined which candidates appeared on the November 3 general election ballot. All the members elected would serve in the Vermont General Assembly.
The 2022 Maine House of Representatives elections took place on November 8, 2022, alongside the biennial United States elections. Maine voters elected members of the Maine House of Representatives via instant-runoff voting in all 151 of the state house's districts, as well as a non-voting member from the Passamaquoddy Tribe. These were the first elections in Maine following the 2020 United States redistricting cycle, which resulted in nearly all members being assigned to new districts.
