Presidential elections · 2000–2024
Rock Island County, IL — Presidential Election Results (2000–2024)
In 2024, Rock Island County, Illinois voted for Kamala D. Harris (Democratic) by D+9.6 — 34,126 Democratic to 28,061 Republican of 63,458 votes cast. From 2020 to 2024 it shifted 2.5 points toward Republicans. That makes it 1.3 points more Republican than Illinois overall (D+10.9).
Data: MIT Election Data & Science Lab, Harvard Dataverse.
Margin by election, 2000–2024
Democratic minus Republican, in points of all votes cast — blue bars Democratic, red Republican.
Every election in Rock Island County
| Year | Democratic | Republican | Other | Dem share | Rep share | Margin |
|---|---|---|---|---|---|---|
| 2024 | 34,126 | 28,061 | 1,271 | 53.8% | 44.2% | D+9.6 |
| 2020 | 36,691 | 28,603 | 1,464 | 55.0% | 42.8% | D+12.1 |
| 2016 | 32,298 | 26,998 | 4,698 | 50.5% | 42.2% | D+8.3 |
| 2012 | 39,157 | 24,934 | 925 | 60.2% | 38.4% | D+21.9 |
| 2008 | 42,210 | 25,364 | 827 | 61.7% | 37.1% | D+24.6 |
| 2004 | 39,880 | 29,663 | 429 | 57.0% | 42.4% | D+14.6 |
| 2000 | 37,957 | 25,194 | 1,944 | 58.3% | 38.7% | D+19.6 |
Rock Island County presidential elections — FAQ
Who carried Rock Island County in the 2024 presidential election?+
Kamala D. Harris (Democratic) carried Rock Island County, Illinois in 2024 by D+9.6, with 63,458 votes cast. Data: MIT Election Data & Science Lab.
How did Rock Island County shift between 2020 and 2024?+
Rock Island County shifted 2.5 points toward Republicans between 2020 (D+12.1) and 2024 (D+9.6).
Is Rock Island County more Democratic or Republican than Illinois overall?+
In 2024, Rock Island County went D+9.6 while Illinois overall went D+10.9 — 1.3 points more Republican than the state.
Where does this election data come from?+
County-level presidential returns (2000–2024) come from the MIT Election Data and Science Lab (MEDSL), published on the Harvard Dataverse. pumsdata is an independent product that makes the data easy to map and compare, and is not affiliated with MEDSL or Harvard.