Median Age in Lake County, IL
ACS 2024 5-Year Estimates
How Lake County Compares
National Distribution
Where Lake County falls among all 3,222 U.S. counties for median age.
■ Lake County: 39.1 years
Ranking Context
| Rank | County | Value |
|---|---|---|
| #2,346 | Macon County, TN | 39.2 years |
| #2,347 | Cabell County, WV | 39.2 years |
| #2,348 | Johnson County, AR | 39.1 years |
| #2,349 | Lake County, IL | 39.1 years |
| #2,350 | Will County, IL | 39.1 years |
| #2,351 | Kosciusko County, IN | 39.1 years |
| #2,352 | Dubuque County, IA | 39.1 years |
Median Age in Lake County, Illinois
Lake County, Illinois has a median age of 39.1 years, which ranks #2,349 of 3,222 out of 3,222 counties nationwide. This is 0.5% above the national value of 38.9 years.
Within Illinois, Lake County ranks #86 of 102 out of 102 counties. This places it in the 27th percentile nationally.
The median age of the total population. 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.