Illinois·IL·FIPS 17031

Cook County

Voted Democratic in 2024 · 2,079,239 votes cast

About Cook County

Cook County is the most populous county in the U.S. state of Illinois and the second-most-populous county in the United States, after Los Angeles County, California. More than 40 percent of all residents of Illinois live within Cook County. As of 2020, the population was 5,275,541. The county seat is Chicago, the most populous city in Illinois and the third most populous city in the United States. The county is at the center of the Chicago metropolitan area.

2024 Presidential Results

All candidates · Cook County, Illinois

Kamala D Harris(Democrat)

69.6%1,447,821

Won by 863,969 votes

Donald J Trump(Republican)

28.1%583,852

Other(Other)

2.2%46,260

Chase Oliver(Libertarian)

0.1%1,306

Margin History

Red = Republican, Blue = Democratic

2024D+41.6

2020D+50.3

2016D+53.7

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Swung Right in 2024

Cook County shifted 8.7 points toward Republicans compared to 2020. Voter turnout decreased by 10.4%.

Cook County — Local Discussion

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What does Cook County really think?

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