Kamala D. Harris won Jefferson County with 58.3% of the vote, ahead of Donald J. Trump. 361,504 votes were counted. The party margin was a Democratic lead of 19.5 points. Compared with the previous presidential election in Jefferson County that is loaded, the margin moved 0.9 points toward Democrats.
Jefferson County leans Democratic by 19.8 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 8.0 points away from the national margin.
In 2024, 361,504 votes were cast in the biggest race, which is 79.3% of the 455,865 citizens aged 18 and over in Jefferson County.
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