The 2024 United States Senate election in Maine was held on November 5, 2024, to elect a member of the U.S. Senate to represent the state of Maine. Incumbent independent Senator Angus King won re-election to a third term, defeating Democratic nominee David Costello, Republican nominee Demitroula Kouzounas, and independent Jason Cherry. Primary elections took place on June 11, 2024.
This election coincided with five referendum questions, including a referendum to change the state flag, as well as the presidential election, U.S. House elections for the state's two congressional districts, and various other state, county and local elections.
King won re-election to a third term in office with 52.06% of the vote. He outperformed Kamala Harris in the concurrent presidential election, winning by a margin of 17.42 percentage points to Harris's margin of 6.94 percentage points. He won six counties that Harris lost.
Counties that flipped from Independent to Republican
King won both congressional districts, which both elected Democrats.
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