Kamala D. Harris won Jefferson County with 54.3% of the vote, ahead of Donald J. Trump. 298,704 votes were counted. The party margin was a Democratic lead of 10.4 points. Compared with the previous presidential election in Jefferson County that is loaded, the margin moved 2.8 points toward Republicans.
Jefferson County leans Democratic by 11.3 points compared with the nation (our partisan lean index, based on president 2024 75% + 2020 25%).
Jefferson County voted for the winner of the national popular vote in 5 of 7 presidential elections from 2000 to 2024. On average its margin sat 5.8 points away from the national margin.
In 2024, 298,704 votes were cast in the biggest race, which is 60.2% of the 498,350 citizens aged 18 and over in Jefferson County.
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