Kamala D. Harris won Fairfax County with 66.1% of the vote, ahead of Donald J. Trump. 584,387 votes were counted. The party margin was a Democratic lead of 35.0 points. Compared with the previous presidential election in Fairfax County that is loaded, the margin moved 6.8 points toward Republicans.
Fairfax County leans Democratic by 37.7 points compared with the nation (our partisan lean index, based on president 2024 75% + 2020 25%).
Fairfax County voted for the winner of the national popular vote in 4 of 7 presidential elections from 2000 to 2024. On average its margin sat 22.1 points away from the national margin.
In 2024, 584,387 votes were cast in the biggest race, which is 77.2% of the 757,185 citizens aged 18 and over in Fairfax County.
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