Kamala D. Harris won Boulder County with 76.5% of the vote, ahead of Donald J. Trump. 196,150 votes were counted. The party margin was a Democratic lead of 55.8 points. Compared with the previous presidential election in Boulder County that is loaded, the margin moved 0.8 points toward Republicans.
Boulder County leans Democratic by 57.4 points compared with the nation (our partisan lean index, based on president 2024 75% + 2020 25%).
Boulder 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 41.8 points away from the national margin.
In 2024, 196,150 votes were cast in the biggest race, which is 77.3% of the 253,800 citizens aged 18 and over in Boulder County.
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