| Name | Rock Island County |
| State | Illinois |
| FIPS Code | 17161 |
| County Seat | Rock Island |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 141,939 |
| Population Growth Rate(2020-2024) | -1.92% |
| Majority Ethnicity | White 72.25% |
| Public School Majority Ethnicity | White 47% |
| Partisan Voting Index | Democratic:+5 |
| Unemployment Rate (May 2026) | 6.0% |
| Sales Tax Rate (2025) | 8.5% |
| Area Code(s) | 309 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 72.25% |
| African American | 10.84% |
| Hispanic | 13.84% |
| Asian | 2.59% |
| Native American | 0.32% |
| Hawaiin/Pacific Islander | 0.16% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 47.07% |
| African American | 19.62% |
| Hispanic | 21.83% |
| Asian | 4.17% |
| Native American | 0.23% |
| Hawaiin/Pacific Islander | 0.08% |