Rock Island city, Illinois
Official LSAD Designation: Rock Island city • Census GEOID: 1765078
• Rock Island County
Demographics & Population Profile
Population and demographics for Rock Island city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 36,225 | — | 2025 | Census |
| Median Age | 37.4 yrs | ±1.5 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 15,285 | ±450 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).