Total Population in Williamson County, IL
ACS 2024 5-Year Estimates
How Williamson County Compares
National Distribution
Where Williamson County falls among all 3,222 U.S. counties for total population.
■ Williamson County: 66,876
Ranking Context
| Rank | County | Value |
|---|---|---|
| #817 | Trujillo Alto Municipio, PR | 67,088 |
| #818 | Aroostook County, ME | 67,058 |
| #819 | St. Francois County, MO | 66,999 |
| #820 | Williamson County, IL | 66,876 |
| #821 | Chippewa County, WI | 66,799 |
| #822 | Ionia County, MI | 66,574 |
| #823 | Jones County, MS | 66,472 |
Total Population in Williamson County, Illinois
Williamson County, Illinois has a total population of 66,876, which ranks #820 of 3,222 out of 3,222 counties nationwide. This is 100.0% below the national value of 330M.
Within Illinois, Williamson County ranks #22 of 102 out of 102 counties. This places it in the 75th 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.