Illinois·IL·FIPS 17133

Monroe County

Voted Republican in 2024 · 20,902 votes cast

About Monroe County

Monroe County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 34,962. Its county seat and largest city is Waterloo. Monroe County is included in the St. Louis, MO-IL Metropolitan Statistical Area. It is located in the southern portion of Illinois known historically as "Little Egypt".

2024 Presidential Results

All candidates · Monroe County, Illinois

Donald J Trump(Republican)

67.2%14,055

Won by 7,582 votes

Kamala D Harris(Democrat)

31.0%6,473

Other(Other)

1.8%369

Chase Oliver(Libertarian)

0.0%5

Margin History

Red = Republican, Blue = Democratic

2024R+36.3

2020R+35.8

2016R+36.7

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Swung Right in 2024

Monroe County shifted 0.5 points toward Republicans compared to 2020. Voter turnout decreased by 1.2%.

Monroe County — Local Discussion

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What does Monroe County really think?

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