Total Population in Marion County, IL
ACS 2024 5-Year Estimates
How Marion County Compares
National Distribution
Where Marion County falls among all 3,222 U.S. counties for total population.
■ Marion County: 37,000
Ranking Context
| Rank | County | Value |
|---|---|---|
| #1,281 | Warren County, MO | 37,177 |
| #1,282 | Uintah County, UT | 37,056 |
| #1,283 | Green County, WI | 37,017 |
| #1,284 | Marion County, IL | 37,000 |
| #1,285 | Essex County, NY | 36,973 |
| #1,286 | Clinton County, IL | 36,954 |
| #1,287 | Whitley County, KY | 36,920 |
Total Population in Marion County, Illinois
Marion County, Illinois has a total population of 37,000, which ranks #1,284 of 3,222 out of 3,222 counties nationwide. This is 100.0% below the national value of 330M.
Within Illinois, Marion County ranks #36 of 102 out of 102 counties. This places it in the 60th 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.