Presidential elections · 2000–2024
Jefferson County, IL — Presidential Election Results (2000–2024)
In 2024, Jefferson County, Illinois voted for Donald J. Trump (Republican) by R+47.7 — 4,240 Democratic to 12,189 Republican of 16,662 votes cast. From 2020 to 2024 it shifted 2.5 points toward Republicans. That makes it 58.6 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 Jefferson County
| Year | Democratic | Republican | Other | Dem share | Rep share | Margin |
|---|---|---|---|---|---|---|
| 2024 | 4,240 | 12,189 | 233 | 25.4% | 73.2% | R+47.7 |
| 2020 | 4,608 | 12,476 | 320 | 26.5% | 71.7% | R+45.2 |
| 2016 | 4,425 | 11,695 | 879 | 26.0% | 68.8% | R+42.8 |
| 2012 | 6,089 | 9,811 | 420 | 37.3% | 60.1% | R+22.8 |
| 2008 | 7,462 | 9,302 | 377 | 43.5% | 54.3% | R+10.7 |
| 2004 | 6,713 | 10,160 | 75 | 39.6% | 59.9% | R+20.3 |
| 2000 | 6,685 | 8,362 | 313 | 43.5% | 54.4% | R+10.9 |
Jefferson County presidential elections — FAQ
Who carried Jefferson County in the 2024 presidential election?+
Donald J. Trump (Republican) carried Jefferson County, Illinois in 2024 by R+47.7, with 16,662 votes cast. Data: MIT Election Data & Science Lab.
How did Jefferson County shift between 2020 and 2024?+
Jefferson County shifted 2.5 points toward Republicans between 2020 (R+45.2) and 2024 (R+47.7).
Is Jefferson County more Democratic or Republican than Illinois overall?+
In 2024, Jefferson County went R+47.7 while Illinois overall went D+10.9 — 58.6 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.