Incumbent Republican Senator John Kissel won re-election to a sixteenth full term.

Incumbent Republican Senator Lisa Seminara ran for re-election to a second term, but was defeated by Democratic nominee Paul Honig in a rematch.

Incumbent Democratic Senator Gary Winfield won re-election to a sixth full term.

Incumbent Democratic Senator Joan Hartley won re-election to a thirteenth term unopposed.

Incumbent Republican Senator Kevin C. Kelly won re-election to an eighth term unopposed.

It was announced on January 7, 2025 that Governor Ned Lamont plans to appoint Kelly to the Connecticut Superior Court.

[6] Incumbent Democratic Senator Marilyn Moore chose to retire instead of running for re-election to a sixth term.

Former Democratic Senator Ernie Newton, who pled guilty to federal felony corruption charges in September 2005 and served several years in federal prison and was later arrested in 2013 for campaign finance violations, made his third unsuccessful attempt at a comeback to the General Assembly, challenging Gaston in the Democratic primary, as well as running as an independent candidate in the general election.

Incumbent Democratic Senator and Majority Leader Bob Duff won re-election to an eleventh term.