New Jersey·NJ·FIPS 34039

Union County

Voted Democratic in 2024 · 240,632 votes cast

About Union County

Union County is a county in the northern-central part of the U.S. state of New Jersey. As of the 2020 United States census, the county was the state's seventh-most-populous county with a population of 575,345, its highest decennial count ever and an increase of 38,846 (+7.2%) from the 2010 census count of 536,499. The United States Census Bureau's Population Estimates Program estimated a 2025 population of 601,863, an increase of 26,518 (+4.6%) from the 2020 decennial census. Its county seat is Elizabeth, which is also the most populous municipality in the county, with a 2020 census population of 137,298, and the largest by area, covering 13.46 square miles (34.9 km2). The county is part of the Central Jersey region of the state.

2024 Presidential Results

All candidates · Union County, New Jersey

Kamala D Harris(Democrat)

61.2%147,327

Won by 58,264 votes

Donald J Trump(Republican)

37.0%89,063

Other(Other)

1.5%3,554

Chase Oliver(Libertarian)

0.3%688

Margin History

Red = Republican, Blue = Democratic

2024D+24.2

2020D+35.7

2016D+35.7

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Swung Right in 2024

Union County shifted 11.5 points toward Republicans compared to 2020. Voter turnout decreased by 4.9%.

Union County — Local Discussion

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What does Union County really think?

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