Kamala D. Harris won St. Louis County with 55.7% of the vote, ahead of Donald J. Trump. 119,009 votes were counted. The party margin was a Democratic lead of 13.7 points. Compared with the previous presidential election in St. Louis County that is loaded, the margin moved 2.0 points toward Republicans.
St. Louis County leans Democratic by 14.5 points compared with the nation (our partisan lean index, based on president 2024 75% + 2020 25%).
St. Louis 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 21.9 points away from the national margin.
In 2024, 119,009 votes were cast in the biggest race, which is 74.0% of the 160,920 citizens aged 18 and over in St. Louis County.
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