Mercer County, IL
IL · Presidential Elections 1892–2024
Mercer County, IL (Illinois) voted R+27.1 for Donald Trump (Republican) in the 2024 presidential election, with Trump receiving 5,215 votes (62.49%) to 2,950 (35.35%) for Harris.
This represents a R+3.2% swing toward Republicans compared to 2020. Mercer County is classified as a solid Republican county. Mercer County has voted Republican in every presidential election since 2016. The county has a population of approximately 15,495.
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 | 35.4%(2,950) | 62.5%(5,215) | R+27.1 | R+3.2 |
| 2020 | 36.8%(3,280) | 60.8%(5,418) | R+24.0 | R+3.6 |
| 2016 | 36.0%(3,071) | 56.4%(4,807) | R+20.4 | R+27.7 |
| 2012 | 52.6%(4,507) | 45.2%(3,876) | D+7.4 | R+4.5 |
| 2008 | 55.2%(4,887) | 43.3%(3,833) | D+11.9 | D+10.7 |
| 2004 | 50.3%(4,512) | 49.1%(4,405) | D+1.2 | R+7.4 |
| 2000 | 52.9%(4,400) | 44.3%(3,688) | D+8.6 | R+11.6 |
| 1996 | 54.2%(4,278) | 34.0%(2,688) | D+20.1 | D+8.3 |
| 1992 | 46.7%(3,990) | 34.9%(2,983) | D+11.8 | D+5.2 |
| 1988 | 53.0%(4,204) | 46.5%(3,683) | D+6.6 | D+16.9 |
Source: Official state election returns via MIT Election Data + Science Lab
Presidential Margin Trend
Mercer County, IL • 1892–2024
Senate Elections
Senate Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 40.7%(2,707) | 59.3%(3,945) | R+18.6 | D+0.2 |
| 2020 | 39.1%(3,420) | 58.0%(5,068) | R+18.8 | R+6.0 |
| 2016 | 40.7%(3,391) | 53.6%(4,465) | R+12.9 | R+10.9 |
| 2014 | 46.6%(3,036) | 48.6%(3,165) | R+2.0 | D+20.4 |
| 2010 | 35.0%(2,321) | 57.4%(3,806) | R+22.4 | R+51.7 |
| 2008 | 62.5%(5,233) | 33.1%(2,773) | D+29.4 | R+5.8 |
| 2004 | 66.3%(5,729) | 31.1%(2,685) | D+35.2 | D+18.4 |
| 2002 | 57.4%(3,872) | 40.6%(2,737) | D+16.8 | D+40.1 |
| 1998 | 36.9%(2,522) | 60.2%(4,115) | R+23.3 | R+31.2 |
| 1996 | 52.4%(4,019) | 44.6%(3,417) | D+7.9 | D+8.0 |
Source: Official state election returns via MIT Election Data + Science Lab
Governor Elections
Governor Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 33.9%(2,297) | 62.5%(4,238) | R+28.6 | R+12.5 |
| 2018 | 36.9%(2,546) | 53.0%(3,658) | R+16.1 | D+6.0 |
| 2014 | 36.3%(2,377) | 58.3%(3,823) | R+22.1 | R+2.5 |
| 2010 | 35.9%(2,403) | 55.5%(3,710) | R+19.5 | R+28.2 |
| 2006 | 51.4%(3,206) | 42.8%(2,668) | D+8.6 | D+14.0 |
| 2002 | 45.8%(3,131) | 51.2%(3,498) | R+5.4 | D+8.0 |
| 1998 | 42.8%(2,948) | 56.2%(3,872) | R+13.4 | D+31.6 |
| 1994 | 26.7%(1,695) | 71.7%(4,550) | R+45.0 | R+37.4 |
| 1990 | 45.5%(3,159) | 53.1%(3,689) | R+7.6 | D+32.7 |
| 1986 | 8.3%(556) | 48.7%(3,253) | R+40.4 | R+34.8 |
Source: Official state election returns via MIT Election Data + Science Lab