McHenry County, IL
IL · Presidential Elections 1892–2024
McHenry County, IL (Illinois) voted R+5.3 for Donald Trump (Republican) in the 2024 presidential election, with Trump receiving 83,933 votes (51.72%) to 75,370 (46.44%) for Harris.
This represents a R+2.8% swing toward Republicans compared to 2020. McHenry County is classified as a lean Republican county. McHenry County has voted Republican in every presidential election since 2012. The county has a population of approximately 312,591.
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 | 46.4%(75,370) | 51.7%(83,933) | R+5.3 | R+2.8 |
| 2020 | 47.5%(78,154) | 50.0%(82,260) | R+2.5 | D+5.0 |
| 2016 | 42.2%(60,803) | 49.8%(71,612) | R+7.5 | D+1.3 |
| 2012 | 44.5%(59,797) | 53.3%(71,598) | R+8.8 | R+14.1 |
| 2008 | 51.9%(72,288) | 46.6%(64,845) | D+5.3 | D+25.7 |
| 2004 | 39.3%(50,330) | 59.7%(76,412) | R+20.4 | R+0.2 |
| 2000 | 38.3%(40,698) | 58.5%(62,112) | R+20.2 | R+8.3 |
| 1996 | 37.5%(31,240) | 49.4%(41,136) | R+11.9 | D+6.9 |
| 1992 | 28.1%(24,783) | 46.8%(41,356) | R+18.8 | D+22.8 |
| 1988 | 28.9%(18,919) | 70.4%(46,135) | R+41.6 | D+11.4 |
Source: Official state election returns via MIT Election Data + Science Lab
Presidential Margin Trend
McHenry County, IL • 1892–2024
Senate Elections
Senate Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 49.4%(56,703) | 50.6%(57,974) | R+1.1 | D+3.0 |
| 2020 | 45.4%(73,803) | 49.4%(80,440) | R+4.1 | D+5.4 |
| 2016 | 41.5%(58,815) | 51.1%(72,296) | R+9.5 | D+9.9 |
| 2014 | 37.9%(35,445) | 57.3%(53,601) | R+19.4 | D+7.2 |
| 2010 | 32.9%(30,889) | 59.5%(55,831) | R+26.6 | R+40.8 |
| 2008 | 54.7%(73,846) | 40.5%(54,635) | D+14.2 | R+12.9 |
| 2004 | 61.6%(76,652) | 34.5%(42,936) | D+27.1 | D+30.5 |
| 2002 | 47.2%(35,820) | 50.6%(38,394) | R+3.4 | D+31.0 |
| 1998 | 31.4%(20,442) | 65.8%(42,847) | R+34.4 | R+16.8 |
| 1996 | 38.5%(31,436) | 56.1%(45,847) | R+17.6 | D+1.7 |
Source: Official state election returns via MIT Election Data + Science Lab
Governor Elections
Governor Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 47.1%(55,134) | 48.6%(56,839) | R+1.5 | D+8.9 |
| 2018 | 41.8%(48,633) | 52.2%(60,646) | R+10.3 | D+24.5 |
| 2014 | 31.0%(29,116) | 65.8%(61,827) | R+34.8 | R+11.5 |
| 2010 | 33.6%(31,659) | 56.9%(53,585) | R+23.3 | R+12.4 |
| 2006 | 37.4%(30,317) | 48.3%(39,113) | R+10.9 | D+13.5 |
| 2002 | 35.0%(26,815) | 59.3%(45,494) | R+24.4 | D+21.8 |
| 1998 | 26.1%(17,003) | 72.2%(47,037) | R+46.1 | D+8.5 |
| 1994 | 21.6%(12,596) | 76.2%(44,414) | R+54.6 | R+27.6 |
| 1990 | 35.7%(17,468) | 62.7%(30,655) | R+27.0 | D+43.5 |
| 1986 | 2.6%(1,086) | 73.0%(30,831) | R+70.5 | R+23.0 |
Source: Official state election returns via MIT Election Data + Science Lab