The 2024 Massachusetts State Senate election was held on Tuesday, November 5, 2024, with the primary election held on Tuesday, September 3, 2024. Massachusetts voters elected all 40 members of the State Senate to serve two-year terms in the Massachusetts General Court. The election coincided with United States national elections and Massachusetts state elections, including U.S. Senate, U.S. House, U.S. President, and Massachusetts House.
Democrats started the 2023 legislative session with 37 members. However, Democratic Senator Anne Gobi resigned on June 4, 2023 and Republican Peter Durant won the subsequent special election, flipped the district for his party, and assumed office on November 29, 2023. Therefore, Democrats held a supermajority of 36 seats compared to the four seats held by Republicans. Republicans would have to net 17 seats to flip control of the chamber.
Republicans flipped a second seat on election day, with Kelly Dooner succeeding retiring incumbent Democrat Marc Pacheco. Democrats held their supermajority, winning 35 seats.
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Three incumbents did not seek re-election.
Due to the size of the Democrats' majority and the low number of competitive seats, most analysts consider a change in control of the chamber to be unlikely.
Republicans won 3 districts that Kamala Harris carried, the 5th district Harris won by less than 0.3%, the 1st by 22.6% and the 30th by 18.5%. Conversely, Democrats won the 13th district that Trump carried by 6.9%.
Italics denote an open seat held by the incumbent party; bold text denotes a gain for a party.
Sources for election results:
General election results are as reported by the Associated Press.
The incumbent was Democrat Paul W. Mark, who was first elected in 2022. He ran for re-election.
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The incumbent was Democrat Paul R. Feeney, who was first elected in 2016. He ran for re-election.
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The incumbent was Democrat Michael J. Rodrigues, who was first elected in 2010. He ran for re-election.
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The incumbent was Democrat Mark C. Montigny, who was first elected in 1992. He ran for re-election.
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The incumbent was Democrat Marc R. Pacheco, who was first elected in 1992. He did not run for re-election.
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|- !colspan="5"|Democratic Party primary results |-
|- !colspan="5"|Republican Party primary results |-
|- !colspan="5"|Democratic Party primary results |-
|- !colspan="5"|Democratic Party primary results |-
|- !colspan="5"|Republican Party primary results |-
|- !colspan="5"|Republican Party primary results |-
|- !colspan="5"|Democratic Party primary results |-