Donald J. Trump won St. Charles County with 57.7% of the vote, ahead of Kamala D. Harris. 226,166 votes were counted. The party margin was a Republican lead of 17.0 points. Compared with the previous presidential election in St. Charles County that is loaded, the margin moved 0.5 points toward Democrats.
St. Charles County leans Republican by 17.4 points compared with the nation (our partisan lean index, based on president 2024 75% + 2020 25%).
St. Charles County voted for the winner of the national popular vote in 2 of 7 presidential elections from 2000 to 2024. On average its margin sat 20.1 points away from the national margin.
In 2024, 226,166 votes were cast in the biggest race, which is 73.1% of the 309,220 citizens aged 18 and over in St. Charles County.
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