Illinois·IL·FIPS 17161

Rock Island County

Voted Democratic in 2024 · 63,458 votes cast

About Rock Island County

Rock Island County is a county located in the U.S. state of Illinois, bounded on the west by the Mississippi River. According to the 2020 census, it had a population of 144,672. Its county seat is Rock Island; its largest city is neighboring Moline. Rock Island County is one of the four counties that make up the Davenport-Moline-Rock Island, IA-IL Metropolitan Statistical Area.

2024 Presidential Results

All candidates · Rock Island County, Illinois

Kamala D Harris(Democrat)

53.8%34,126

Won by 6,065 votes

Donald J Trump(Republican)

44.2%28,061

Other(Other)

2.0%1,239

Chase Oliver(Libertarian)

0.1%32

Margin History

Red = Republican, Blue = Democratic

2024D+9.6

2020D+12.1

2016D+8.3

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Swung Right in 2024

Rock Island County shifted 2.6 points toward Republicans compared to 2020. Voter turnout decreased by 4.9%.

Rock Island County — Local Discussion

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What does Rock Island County really think?

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