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Illinois·IL·FIPS 17199
Williamson County
Voted Republican in 2024 · 33,068 votes cast
About Williamson County
Williamson County is a county in Illinois. At the 2020 census, it had a population of 67,153. Its largest city and county seat is Marion. Williamson County is part of the Metro Lakeland area of Southern Illinois.
Read more on Wikipedia →Total Votes (2024)
33,068
Winner Margin
R+38.7
Turnout Change
-1.7%
2020→2024 Swing
R+1.3
2024 Presidential Results
All candidates · Williamson County, Illinois
Donald J Trump(Republican)
68.6%22,686
Won by 12,796 votes
Kamala D Harris(Democrat)
29.9%9,890
Other(Other)
1.4%477
Chase Oliver(Libertarian)
0.0%15
Margin History
Red = Republican, Blue = Democratic
2024R+38.7
2020R+37.4
2016R+40.8
🔴
Swung Right in 2024
Williamson County shifted 1.3 points toward Republicans compared to 2020. Voter turnout decreased by 1.7%.
What does Williamson County really think?
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Election data: MIT Election Data Science Lab, Harvard Dataverse (CC BY 4.0)