Rock Island County, Illinois
Latest: 2024
Leans Democratic — 40 presidential elections on record
Race & ancestry
| Group | % |
|---|---|
▶White (Non-Hispanic)(13) | 67.4% |
▶Hispanic / Latino(14) | 14.2% |
▶Black / African American(10) | 11.4% |
▶Asian(6) | 2.8% |
▶Middle Eastern / North African(8) | 0.1% |
▶Native American / Alaska Native(1) | 0.4% |
▶Native Hawaiian / Pacific Islander(1) | 0.2% |
Multiracial / Other | 3.7% |
Religious adherence
| Tradition | % Pop | % Adherents |
|---|---|---|
| Catholic | 10.0% | 31.7% |
| Evangelical Protestant | 8.0% | 25.4% |
| Mainline Protestant | 7.1% | 22.5% |
| Black Protestant | 3.4% | 10.9% |
| Other | 2.7% | 8.6% |
| LDS (Mormon) | 1.0% | 3.0% |
| Orthodox Christian | 0.3% | 0.9% |
| Non-religious | 68.4% | — |
Presidential results
| Year | Result |
|---|---|
| 2024 | Harris+9.6 |
| 2020 | Biden+12.1 |
| 2016 | Clinton+8.3 |
| 2012 | Obama+21.8 |
| 2008 | Obama+24.6 |
| 2004 | Kerry+14.6 |
| 2000 | Gore+19.8 |
| 1996 | Clinton+23.3 |
| 1992 | Clinton+19.7 |
Rock Island, Illinois is a county that has a population of 142,757. In the 2024 presidential election, it voted Democratic with a margin of D+9.6. Akashic Edge tracks 40 presidential elections here, dating back to 1868.
| Year | Dem % | Rep % | Margin | Swing |
|---|---|---|---|---|
| 2024 | 53.8% | 44.2% | D+9.6 | R+2.5 |
| 2020 | 54.8% | 42.7% | D+12.1 | D+3.8 |
| 2016 | 50.5% | 42.2% | D+8.3 | R+13.5 |
| 2012 | 60.0% | 38.2% | D+21.8 | R+2.7 |
| 2008 | 61.5% | 37.0% | D+24.6 | D+10.0 |
| 2004 | 57.0% | 42.4% | D+14.6 | R+5.2 |
| 2000 | 58.8% | 39.1% | D+19.8 | R+3.5 |
| 1996 | 57.1% | 33.8% | D+23.3 | D+3.6 |
| 1992 | 51.9% | 32.2% | D+19.7 | D+0.9 |
| 1988 | 59.2% | 40.4% | D+18.8 | D+12.1 |
| 1984 | 53.1% | 46.4% | D+6.7 | D+13.3 |
| 1980 | 41.9% | 48.5% | R+6.6 | R+9.4 |
| 1976 | 50.5% | 47.7% | D+2.8 | D+9.9 |
| 1972 | 46.3% | 53.4% | R+7.1 | R+13.0 |
| 1968 | 49.2% | 43.3% | D+5.8 | R+21.7 |
| 1964 | 63.8% | 36.2% | D+27.6 | D+25.6 |
| 1960 | 50.9% | 49.0% | D+1.9 | D+5.7 |
| 1956 | 48.1% | 51.9% | R+3.8 | D+4.5 |
| 1952 | 45.8% | 54.1% | R+8.3 | R+13.3 |
| 1948 | 52.0% | 47.0% | D+5.0 | — |
What defines Rock Island?
Rock Island voted solidly Democratic in 2024. Akashic Edge tracks 40 presidential elections here, revealing how its political character has evolved over more than a century.
County in State Context
Current Illinois Polling
Contextual statewide polling for Illinois. County pages stay rooted in county returns, but live statewide polling helps frame the current cycle.
2026 Illinois Senate Democratic Primary
Raja Krishnamoorthi leads at 32.1%
7 pollsMedium
Field Preview
Ask the Historian
Explore this county's political evolution with the Historian
Key Insights
High-confidence patterns distilled from this geography's election history.
- Has voted Democratic in the last 5 presidential elections
- Turnout of 60.1% in 2024 ranked 90 of 102 in the state — bottom quartile
- College attainment is 25% — 8pp below the national average. Similar education levels correlate with Republican lean nationally
Located In
Rock Island sits inside these higher-level geographies.