Kamala D. Harris won Jefferson County with 70.7% of the vote, ahead of Donald J. Trump. 24,698 votes were counted. The party margin was a Democratic lead of 45.1 points. Compared with the previous presidential election in Jefferson County that is loaded, the margin moved 3.6 points toward Democrats.
Jefferson County leans Democratic by 45.8 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 31.6 points away from the national margin.
In 2024, 24,698 votes were cast in the biggest race, which is 86.0% of the 28,710 citizens aged 18 and over in Jefferson County.
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