2018 Connecticut elections

The 2018 Connecticut elections were held on Tuesday, November 6, 2018, to elect the following offices: Governor and Lieutenant Governor (on one ticket), Attorney General, Secretary of the State, Comptroller, Treasurer, U.S. Senate, U.S. House of Representatives, Connecticut State Senate, Connecticut State House of Representatives, and various others. Primary elections were held on August 14, 2018.

The Democratic Party performed strongly in federal elections with incumbent Democrats winning re-election to all five Connecticut seats in the U.S. House of Representatives by more than 10 points, and incumbent U.S. Senator Chris Murphy winning re-election by 20 points. Democrats also performed strongly in the Connecticut General Assembly, gaining 12 seats in the State House of Representatives and 5 seats in the State Senate. However, this "blue wave" did not transfer to all state elections. Although typically considered a "blue state", no Democrat had won a gubernatorial election in the state by more than 5 points since 1986. This continued in 2018, with Democratic nominee Ned Lamont only winning the governorship by 3 points.

United States House of Representatives
Incumbent Democrats won re-election to all five Connecticut seats in the United States House of Representatives.

United States Senate
Incumbent Democratic U.S. Senator Chris Murphy won re-election against Republican Matthew Corey.

Governor
Two-term incumbent Democratic Governor Dannel Malloy and Lieutenant Governor Nancy Wyman were eligible for a third term but declined to run for re-election. Democratic nominees Ned Lamont and his running mate Susan Bysiewicz won the election against Republican nominees Bob Stefanowski and Joe Markley.

Attorney general
Two-term incumbent Democratic State Attorney General George Jepsen did not seek re-election. Democratic nominee and state representative William Tong defeated Republican nominee Susan Hatfield.

Secretary of state
Incumbent Democratic Secretary of the State Denise Merrill won re-election to a third term against Republican nominee Susan Chapman.

State Comptroller
Two-term incumbent Democratic State Comptroller Kevin Lembo won re-election to a third term against Republican nominee Kurt Miller.

State treasurer
Five-term incumbent Democratic State Treasurer Denise Nappier did not seek re-election. Democratic nominee Shawn Wooden defeated Republican nominee Thad Gray.

Connecticut State Senate
Democrats won 23 seats while Republicans won 13, expanding their majority by 5 seats.

Connecticut House of Representatives
Democrats won 92 seats while Republicans won 59, expanding their majority by 12 seats.