New York·NY·FIPS 36045

Jefferson County

Voted Republican in 2024 · 42,843 votes cast

About Jefferson County

Jefferson County is a county on the northern border of the U.S. state of New York. As of the 2020 census, the population was 116,721. Its county seat is Watertown. The county is named after Thomas Jefferson, third President of the United States of America. It is adjacent to Lake Ontario, southeast from the Canada–US border of Ontario. The county is part of the North Country region of the state.

2024 Presidential Results

All candidates · Jefferson County, New York

Donald J Trump(Republican)

61.7%26,417

Won by 10,091 votes

Kamala D Harris(Democrat)

38.1%16,326

Other(Other)

0.2%74

Chase Oliver(Libertarian)

0.1%26

Margin History

Red = Republican, Blue = Democratic

2024R+23.6

2020R+18.9

2016R+20.8

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Swung Right in 2024

Jefferson County shifted 4.7 points toward Republicans compared to 2020. Voter turnout decreased by 2.9%.

Jefferson County — Local Discussion

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Election data: MIT Election Data Science Lab, Harvard Dataverse (CC BY 4.0)