Median Age in McHenry County, IL
ACS 2024 5-Year Estimates
How McHenry County Compares
National Distribution
Where McHenry County falls among all 3,222 U.S. counties for median age.
■ McHenry County: 40.7 years
Ranking Context
| Rank | County | Value |
|---|---|---|
| #1,885 | Columbia County, FL | 40.7 years |
| #1,886 | Miami-Dade County, FL | 40.7 years |
| #1,887 | Lawrence County, IL | 40.7 years |
| #1,888 | McHenry County, IL | 40.7 years |
| #1,889 | Howard County, IN | 40.7 years |
| #1,890 | Washington County, IA | 40.7 years |
| #1,891 | Allen County, KY | 40.7 years |
Median Age in McHenry County, Illinois
McHenry County, Illinois has a median age of 40.7 years, which ranks #1,888 of 3,222 out of 3,222 counties nationwide. This is 4.6% above the national value of 38.9 years.
Within Illinois, McHenry County ranks #73 of 102 out of 102 counties. This places it in the 41th 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.