Rock Island County, IL
IL · Presidential Elections 1892–2024
Rock Island County, IL (Illinois) voted D+9.6 for Kamala Harris (Democrat) in the 2024 presidential election, with Harris receiving 34,126 votes (53.78%) to 28,061 (44.22%) for Trump.
This represents a R+2.5% swing toward Republicans compared to 2020. Rock Island County is classified as a lean Democratic county. Rock Island County has voted Democratic in every presidential election since 1984. The county has a population of approximately 142,757.
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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 | 53.8%(34,126) | 44.2%(28,061) | D+9.6 | R+2.5 |
| 2020 | 54.8%(36,691) | 42.7%(28,603) | D+12.1 | D+3.8 |
| 2016 | 50.5%(32,298) | 42.2%(26,998) | D+8.3 | R+13.5 |
| 2012 | 60.0%(39,157) | 38.2%(24,934) | D+21.8 | R+2.8 |
| 2008 | 61.7%(42,210) | 37.1%(25,364) | D+24.6 | D+10.0 |
| 2004 | 57.0%(39,880) | 42.4%(29,663) | D+14.6 | R+5.0 |
| 2000 | 58.3%(37,957) | 38.7%(25,194) | D+19.6 | R+3.7 |
| 1996 | 57.1%(34,822) | 33.8%(20,626) | D+23.3 | D+3.6 |
| 1992 | 51.9%(37,412) | 32.2%(23,212) | D+19.7 | D+0.9 |
| 1988 | 59.2%(40,174) | 40.4%(27,412) | D+18.8 | D+12.1 |
Source: Official state election returns via MIT Election Data + Science Lab
Presidential Margin Trend
Rock Island County, IL • 1892–2024
Senate Elections
Senate Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 56.5%(26,638) | 43.5%(20,548) | D+12.9 | R+0.4 |
| 2020 | 55.2%(36,493) | 41.9%(27,705) | D+13.3 | D+3.4 |
| 2016 | 52.4%(32,952) | 42.6%(26,767) | D+9.8 | R+0.7 |
| 2014 | 53.6%(24,143) | 43.1%(19,406) | D+10.5 | D+16.6 |
| 2010 | 44.3%(20,445) | 50.3%(23,249) | R+6.1 | R+42.3 |
| 2008 | 66.5%(44,418) | 30.2%(20,172) | D+36.3 | R+7.8 |
| 2004 | 71.1%(49,096) | 27.0%(18,620) | D+44.1 | D+16.3 |
| 2002 | 63.1%(26,998) | 35.3%(15,096) | D+27.8 | D+41.4 |
| 1998 | 41.6%(19,615) | 55.1%(25,998) | R+13.5 | R+32.1 |
| 1996 | 57.7%(34,604) | 39.0%(23,431) | D+18.6 | D+8.1 |
Source: Official state election returns via MIT Election Data + Science Lab
Governor Elections
Governor Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 52.9%(25,663) | 43.5%(21,130) | D+9.3 | D+0.8 |
| 2018 | 50.8%(25,774) | 42.3%(21,434) | D+8.6 | D+13.4 |
| 2014 | 45.6%(20,495) | 50.5%(22,680) | R+4.9 | D+0.3 |
| 2010 | 44.2%(20,514) | 49.4%(22,904) | R+5.2 | R+24.7 |
| 2006 | 56.7%(26,201) | 37.1%(17,168) | D+19.5 | D+8.3 |
| 2002 | 54.3%(23,193) | 43.1%(18,382) | D+11.3 | D+16.9 |
| 1998 | 46.5%(22,051) | 52.1%(24,733) | R+5.7 | D+24.6 |
| 1994 | 34.1%(14,238) | 64.4%(26,901) | R+30.3 | R+37.4 |
| 1990 | 53.0%(23,572) | 45.9%(20,413) | D+7.1 | D+37.0 |
| 1986 | 10.6%(4,700) | 40.5%(18,023) | R+29.9 | R+40.7 |
Source: Official state election returns via MIT Election Data + Science Lab