Presidential elections · 2000–2024
Williamson County, IL — Presidential Election Results (2000–2024)
In 2024, Williamson County, Illinois voted for Donald J. Trump (Republican) by R+38.7 — 9,890 Democratic to 22,686 Republican of 33,068 votes cast. From 2020 to 2024 it shifted 1.3 points toward Republicans. That makes it 49.6 points more Republican than Illinois overall (D+10.9).
Data: MIT Election Data & Science Lab, Harvard Dataverse.
Margin by election, 2000–2024
Democratic minus Republican, in points of all votes cast — blue bars Democratic, red Republican.
Every election in Williamson County
| Year | Democratic | Republican | Other | Dem share | Rep share | Margin |
|---|---|---|---|---|---|---|
| 2024 | 9,890 | 22,686 | 492 | 29.9% | 68.6% | R+38.7 |
| 2020 | 10,206 | 22,801 | 646 | 30.3% | 67.8% | R+37.4 |
| 2016 | 8,581 | 21,570 | 1,701 | 26.9% | 67.7% | R+40.8 |
| 2012 | 10,647 | 17,909 | 587 | 36.5% | 61.5% | R+24.9 |
| 2008 | 12,914 | 17,387 | 520 | 41.9% | 56.4% | R+14.5 |
| 2004 | 11,685 | 18,086 | 189 | 39.0% | 60.4% | R+21.4 |
| 2000 | 12,192 | 14,012 | 735 | 45.3% | 52.0% | R+6.8 |
Williamson County presidential elections — FAQ
Who carried Williamson County in the 2024 presidential election?+
Donald J. Trump (Republican) carried Williamson County, Illinois in 2024 by R+38.7, with 33,068 votes cast. Data: MIT Election Data & Science Lab.
How did Williamson County shift between 2020 and 2024?+
Williamson County shifted 1.3 points toward Republicans between 2020 (R+37.4) and 2024 (R+38.7).
Is Williamson County more Democratic or Republican than Illinois overall?+
In 2024, Williamson County went R+38.7 while Illinois overall went D+10.9 — 49.6 points more Republican than the state.
Where does this election data come from?+
County-level presidential returns (2000–2024) come from the MIT Election Data and Science Lab (MEDSL), published on the Harvard Dataverse. pumsdata is an independent product that makes the data easy to map and compare, and is not affiliated with MEDSL or Harvard.