Median Age in Johnson County, IA
ACS 2024 5-Year Estimates
How Johnson County Compares
National Distribution
Where Johnson County falls among all 3,222 U.S. counties for median age.
■ Johnson County: 31.0 years
Ranking Context
| Rank | County | Value |
|---|---|---|
| #3,155 | Monroe County, IN | 31.2 years |
| #3,156 | Moore County, TX | 31.2 years |
| #3,157 | Clark County, ID | 31.1 years |
| #3,158 | Johnson County, IA | 31.0 years |
| #3,159 | Seward County, KS | 31.0 years |
| #3,160 | Roosevelt County, MT | 30.9 years |
| #3,161 | Grand Forks County, ND | 30.9 years |
Median Age in Johnson County, Iowa
Johnson County, Iowa has a median age of 31.0 years, which ranks #3,158 of 3,222 out of 3,222 counties nationwide. This is 20.3% below the national value of 38.9 years.
Within Iowa, Johnson County ranks #98 of 99 out of 99 counties. This places it in the 2th 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.