Kamala D. Harris won Gallatin County with 50.0% of the vote, ahead of Donald J. Trump. 69,897 votes were counted. The party margin was a Democratic lead of 3.2 points. Compared with the previous presidential election in Gallatin County that is loaded, the margin moved 4.3 points toward Republicans.
Gallatin County leans Democratic by 4.4 points compared with the nation (our partisan lean index, based on president 2024 75% + 2020 25%).
Gallatin 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 9.5 points away from the national margin.
In 2024, 70,555 votes were cast in the biggest race, which is 73.2% of the 96,430 citizens aged 18 and over in Gallatin County.
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