The 2024 Connecticut State Senate election was held on November 5, 2024, alongside the 2024 United States elections. Primary elections took place on August 13, 2024.
Democrats won one new seat, increasing their supermajority to 25 of the 36 Senate seats.
One incumbent did not seek re-election.
Italics denote an open seat held by the incumbent party; bold text denotes a gain for a party.
Incumbent Democratic Senator John Fonfara won re-election to a fifteenth term.
Incumbent Democratic Senator Douglas McCrory won re-election to a fourth full term.
Incumbent Democratic Senator Saud Anwar won re-election to a fourth term.
Incumbent Democratic Senator MD Rahman won re-election to a second term.
Incumbent Democratic Senator Derek Slap won re-election to a third full term.
Incumbent Democratic Senator Rick Lopes won re-election to a third term.
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 Matt Lesser won re-election to a fourth term unopposed.
Incumbent Democratic Senator Gary Winfield won re-election to a sixth full term.
Incumbent Democratic Senator and President pro tempore of the Connecticut Senate Martin Looney won re-election to a seventeenth term.
Incumbent Democratic Senator Christine Cohen won re-election to a fourth term.
Incumbent Democratic Senator Jan Hochadel won re-election to a second term.
Incumbent Democratic Senator James Maroney won re-election to a fourth term.
Incumbent Democratic Senator Joan Hartley won re-election to a thirteenth term unopposed.
Incumbent Republican Senator Rob Sampson won re-election to a fourth term.
Incumbent Democratic Senator Jorge Cabrera won re-election to a third term unopposed.
Incumbent Republican Senator Heather Somers won re-election to a fifth term.
Incumbent Democratic Senator Cathy Osten won re-election to a seventh term.
Incumbent Democratic Senator Martha Marx won re-election to a second term.
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. Kelly did not take the oath of office the following day, and a special election will be held to fill the seat for the remainder of Kelly's term.
Incumbent Democratic Senator Marilyn Moore chose to retire instead of running for re-election to a sixth term. Democratic nominee Sujata Gadkar-Wilcox won the open seat.
Incumbent Democratic Senator Herron Gaston won re-election to a second 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 Julie Kushner won re-election to a fourth term.
Incumbent Democratic Senator and Majority Leader Bob Duff won re-election to an eleventh term.
Incumbent Democratic Senator Ceci Maher won re-election to a second term.
Incumbent Democratic Senator Patricia Billie Miller won re-election to a second full term.
Incumbent Republican Senator Tony Hwang won re-election to a sixth term.
Incumbent Democratic Senator Mae Flexer won re-election to a sixth term.
Incumbent Republican Senator and Minority Leader Stephen Harding won re-election to a second term.
Incumbent Republican Senator Henri Martin won re-election to a sixth term unopposed.
Incumbent Republican Senator Eric Berthel won re-election to a fourth full term.
Incumbent Democratic Senator Norman Needleman won re-election to a fourth term.
Incumbent Republican Senator Paul Cicarella won re-election to a third term.
Incumbent Republican Senator Jeff Gordon won re-election to a second term.
Incumbent Republican Senator Ryan Fazio won re-election to a third term against Nick Simmons, the former deputy Chief of Staff to governor Ned Lamont and brother of Stamford Mayor Caroline Simmons.
The previous Democratic candidate for this district, Trevor Crow, initially ran for this seat again, but dropped out after Democratic town committees in Greenwich and New Canaan selected delegates to the nominating convention who publicly supported Simmons.