Johnson County, IL
IL · Presidential Elections 1892–2024
Johnson County, IL (Illinois) voted R+58.3 for Donald Trump (Republican) in the 2024 presidential election, with Trump receiving 4,798 votes (78.62%) to 1,241 (20.33%) for Harris.
This represents a D+0.3% swing toward Democrats compared to 2020. Johnson County is classified as a deep Republican county. Johnson County has voted Republican in every presidential election since 1996. The county has a population of approximately 13,376.
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 | 20.3%(1,241) | 78.6%(4,798) | R+58.3 | D+0.3 |
| 2020 | 19.9%(1,281) | 78.4%(5,059) | R+58.6 | R+1.0 |
| 2016 | 18.8%(1,142) | 76.3%(4,649) | R+57.6 | R+15.6 |
| 2012 | 27.6%(1,572) | 69.6%(3,963) | R+42.0 | R+7.4 |
| 2008 | 31.7%(1,871) | 66.3%(3,912) | R+34.6 | D+2.7 |
| 2004 | 30.9%(1,813) | 68.2%(3,997) | R+37.2 | R+11.9 |
| 2000 | 36.0%(1,928) | 61.3%(3,285) | R+25.3 | R+20.6 |
| 1996 | 40.8%(2,009) | 45.5%(2,241) | R+4.7 | R+8.0 |
| 1992 | 42.6%(2,299) | 39.4%(2,124) | D+3.2 | D+23.0 |
| 1988 | 39.9%(1,872) | 59.6%(2,797) | R+19.7 | D+15.2 |
Source: Official state election returns via MIT Election Data + Science Lab
Presidential Margin Trend
Johnson County, IL • 1892–2024
Senate Elections
Senate Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 22.8%(1,091) | 77.2%(3,690) | R+54.4 | R+5.9 |
| 2020 | 24.6%(1,559) | 73.0%(4,626) | R+48.4 | R+22.9 |
| 2016 | 34.6%(2,056) | 60.2%(3,572) | R+25.5 | D+7.6 |
| 2014 | 31.2%(1,418) | 64.3%(2,924) | R+33.1 | D+9.3 |
| 2010 | 25.4%(1,157) | 67.8%(3,094) | R+42.4 | R+42.0 |
| 2008 | 46.8%(2,667) | 47.2%(2,693) | R+0.5 | R+3.4 |
| 2004 | 49.9%(2,781) | 46.9%(2,617) | D+2.9 | D+7.8 |
| 2002 | 46.6%(2,145) | 51.5%(2,369) | R+4.9 | D+30.8 |
| 1998 | 30.9%(1,411) | 66.5%(3,040) | R+35.6 | R+29.0 |
| 1996 | 44.5%(2,132) | 51.1%(2,451) | R+6.7 | D+3.9 |
Source: Official state election returns via MIT Election Data + Science Lab
Governor Elections
Governor Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 18.2%(908) | 78.3%(3,918) | R+60.2 | R+29.6 |
| 2018 | 27.5%(1,427) | 58.1%(3,013) | R+30.6 | D+14.8 |
| 2014 | 24.1%(1,099) | 69.5%(3,170) | R+45.4 | R+8.7 |
| 2010 | 28.1%(1,309) | 64.7%(3,021) | R+36.7 | R+27.7 |
| 2006 | 38.5%(1,695) | 47.4%(2,090) | R+9.0 | D+5.9 |
| 2002 | 41.7%(2,005) | 56.6%(2,717) | R+14.8 | R+53.3 |
| 1998 | 68.9%(3,345) | 30.5%(1,480) | D+38.4 | D+89.6 |
| 1994 | 23.3%(977) | 74.5%(3,119) | R+51.1 | R+49.8 |
| 1990 | 49.0%(2,112) | 50.4%(2,170) | R+1.3 | D+52.0 |
| 1986 | 4.4%(187) | 57.8%(2,455) | R+53.4 | R+30.1 |
Source: Official state election returns via MIT Election Data + Science Lab