2024Final results
2024 election for Connecticut Senate District 20
Connecticut State Senate · Connecticut
Martha Marx (D) won with 56.2% of the vote, defeating Shaun Mastroianni (R) by 12.3 points.
Martha MarxDemocrat · winner
56.2%27,864
Shaun MastroianniRepublican
43.8%21,757
49,621 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
The seat over time
D − R margin in this seat's races around 2024
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET