Kamala D. Harris won Costilla County with 55.5% of the vote, ahead of Donald J. Trump. 2,080 votes were counted. The party margin was a Democratic lead of 14.7 points. Compared with the previous presidential election in Costilla County that is loaded, the margin moved 12.6 points toward Republicans.
Costilla County leans Democratic by 18.3 points compared with the nation (our partisan lean index, based on president 2024 75% + 2020 25%).
Costilla 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 32.8 points away from the national margin.
In 2024, 2,080 votes were cast in the biggest race, which is 75.5% of the 2,755 citizens aged 18 and over in Costilla County.
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