Total Population in Rock Island County, IL
ACS 2024 5-Year Estimates
How Rock Island County Compares
National Distribution
Where Rock Island County falls among all 3,222 U.S. counties for total population.
■ Rock Island County: 142,757
Ranking Context
| Rank | County | Value |
|---|---|---|
| #471 | Schuylkill County, PA | 143,558 |
| #472 | Sumter County, FL | 143,408 |
| #473 | Grayson County, TX | 143,337 |
| #474 | Rock Island County, IL | 142,757 |
| #475 | Monroe County, IN | 140,965 |
| #476 | Warren County, KY | 140,918 |
| #477 | Cache County, UT | 140,046 |
Total Population in Rock Island County, Illinois
Rock Island County, Illinois has a total population of 142,757, which ranks #474 of 3,222 out of 3,222 counties nationwide. This is 100.0% below the national value of 330M.
Within Illinois, Rock Island County ranks #14 of 102 out of 102 counties. This places it in the 85th percentile nationally.
Total population count from the American Community Survey. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.
About this data
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.