The 2016 Connecticut Senate election was held on November 8, 2016, concurrently with the elections for the Connecticut House of Representatives, to elect members to the Connecticut General Assembly. All 36 seats in the Connecticut Senate were up for election. The election resulted in a tie, with the parties controlling 18 seats each. Primary elections were held on August 9, 2016.
Democratic incumbent John Fonfara was re-elected to an 11th term after defeating Republican candidate Barbara Ruhe and Green Party candidate Barbara Barry. Fonfara has represented the 1st District since 1997.
Democratic incumbent Eric Coleman was re-elected to a 12th term after defeating Republican candidate Theresa Tillett and write-in candidates Charles Jackson and Martha S. Kelly. Coleman was also nominated by the Working Families Party. He has represented the 2nd District since 1995.
Democratic incumbent Timothy Larson was re-elected to a second term after defeating Republican candidate Carolyn Mirek. Mirek was also nominated by the Independent Party. Larson has represented the 3rd District since 2015.