The 2024 United States Senate election in Massachusetts took place on November 5, 2024. Democratic incumbent Senator Elizabeth Warren successfully ran for a third term, securing 59.81% of the vote. Warren was challenged by Republican attorney John Deaton. Primary elections took place on September 3, 2024.
This election marked the first time that Warren had lost Bristol County while running for the office. Warren underperformed Kamala Harris by 6 points in the concurrent presidential election, making her the second-worst Democratic Senate performer in the 2024 cycle after Angela Alsobrooks in Maryland.
Warren received 84,850 (1.4 percent) votes fewer than Harris. John Deaton ran as an anti-Trump centrist Republican.
Democratic primary
Candidates
Nominee
- Elizabeth Warren, incumbent U.S. senator (2013–present)
Declined
- Jake Auchincloss, U.S. representative for Massachusetts's 4th congressional district (2021–present) (ran for re-election)
- Seth Moulton, U.S. representative for Massachusetts's 6th congressional district (2015–present) (ran for re-election)
- Ayanna Pressley, U.S. representative for Massachusetts's 7th congressional district (2019–present) (endorsed Warren, ran for re-election)
- Michelle Wu, mayor of Boston (2021–present) (endorsed Warren)
Endorsements
Elizabeth Warren
Republican primary
Candidates
Nominee
Eliminated in primary
- Robert Antonellis, nutrition software company owner and self-professed conspiracy theorist
- Ian Cain, president of the Quincy City Council
Declined
- Charlie Baker, former Governor of Massachusetts from 2015 to 2023
- Chris Doughty, manufacturing executive and candidate for governor in 2022
Workers Party primary
Candidates
Withdrawn
Libertarian primary
Candidates
Withdrew
- Louis Marino, former Chelmsford town meeting representative
General election
Polling
Aggregate polls
Results
By congressional district
Warren won all nine congressional districts.