Williamson County, IL
IL · Presidential Elections 1892–2024
Williamson County, IL (Illinois) voted R+38.7 for Donald Trump (Republican) in the 2024 presidential election, with Trump receiving 22,686 votes (68.6%) to 9,890 (29.91%) for Harris.
This represents a R+1.4% swing toward Republicans compared to 2020. Williamson County is classified as a deep Republican county. Williamson County has voted Republican in every presidential election since 2000. The county has a population of approximately 66,876.
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Quick Stats
Demographics
Community Profile
Religious Composition
Source: Religion Census 2020Ancestry Groups
Source: Census ACSTop reported ancestry groups (compared to national average).
Age Distribution
Employment by Industry
Census ACSPresidential Elections
Presidential Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2024 | 29.9%(9,890) | 68.6%(22,686) | R+38.7 | R+1.4 |
| 2020 | 30.3%(10,206) | 67.6%(22,801) | R+37.3 | D+3.4 |
| 2016 | 26.9%(8,581) | 67.7%(21,570) | R+40.8 | R+16.0 |
| 2012 | 36.4%(10,647) | 61.2%(17,909) | R+24.8 | R+10.1 |
| 2008 | 41.8%(12,589) | 56.5%(17,039) | R+14.8 | D+6.6 |
| 2004 | 39.0%(11,685) | 60.4%(18,086) | R+21.4 | R+14.6 |
| 2000 | 45.3%(12,192) | 52.0%(14,012) | R+6.8 | R+17.7 |
| 1996 | 49.5%(12,510) | 38.5%(9,734) | D+11.0 | R+6.0 |
| 1992 | 49.9%(14,361) | 32.9%(9,462) | D+17.0 | D+15.3 |
| 1988 | 50.6%(12,712) | 48.8%(12,274) | D+1.7 | D+14.2 |
Source: Official state election returns via MIT Election Data + Science Lab
Presidential Margin Trend
Williamson County, IL • 1892–2024
Senate Elections
Senate Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 33.0%(8,205) | 67.0%(16,665) | R+34.0 | R+6.2 |
| 2020 | 34.6%(11,473) | 62.4%(20,679) | R+27.8 | R+19.6 |
| 2016 | 43.4%(13,518) | 51.6%(16,075) | R+8.2 | D+12.4 |
| 2014 | 37.8%(7,686) | 58.5%(11,880) | R+20.6 | D+6.0 |
| 2010 | 33.2%(7,320) | 59.8%(13,197) | R+26.6 | R+41.9 |
| 2008 | 55.1%(16,002) | 39.8%(11,564) | D+15.3 | R+6.1 |
| 2004 | 58.9%(17,113) | 37.5%(10,902) | D+21.4 | D+8.6 |
| 2002 | 55.6%(11,498) | 42.8%(8,856) | D+12.8 | D+32.7 |
| 1998 | 38.7%(8,792) | 58.7%(13,317) | R+19.9 | R+28.5 |
| 1996 | 52.9%(13,096) | 44.3%(10,973) | D+8.6 | D+3.4 |
Source: Official state election returns via MIT Election Data + Science Lab
Governor Elections
Governor Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 27.1%(6,821) | 70.5%(17,723) | R+43.4 | R+24.7 |
| 2018 | 35.1%(9,440) | 53.8%(14,471) | R+18.7 | D+15.2 |
| 2014 | 30.3%(6,177) | 64.2%(13,081) | R+33.9 | R+17.9 |
| 2010 | 38.6%(8,654) | 54.6%(12,240) | R+16.0 | R+17.4 |
| 2006 | 41.6%(8,493) | 40.2%(8,198) | D+1.4 | D+8.2 |
| 2002 | 45.4%(9,627) | 52.1%(11,054) | R+6.7 | R+71.6 |
| 1998 | 82.2%(19,510) | 17.3%(4,110) | D+64.8 | D+106.0 |
| 1994 | 28.3%(5,603) | 69.4%(13,737) | R+41.1 | R+53.4 |
| 1990 | 55.7%(11,937) | 43.4%(9,304) | D+12.3 | D+54.9 |
| 1986 | 7.2%(1,512) | 49.8%(10,467) | R+42.6 | R+48.4 |
Source: Official state election returns via MIT Election Data + Science Lab