Median Age in Union County, IA
ACS 2024 5-Year Estimates
40.5 years
Rank #1,951/3,222 · #70 in IA
39th
Union 40.5 years
IA 38.6 years +4.9%
US 38.9 years +4.1%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Union County's median age of 40.5 years compares to all 3,222 U.S. counties. Values range from 21.4 years to 86.2 years.
Distribution of Median Age Across All Counties
Ranking Context
Counties ranked closest to Union County for median age.
Nearby Rankings
Full ranking →| #1,948 | Berrien County, GA | 40.5 years |
| #1,949 | Brantley County, GA | 40.5 years |
| #1,950 | Bear Lake County, ID | 40.5 years |
| #1,951 | Union County, IA | 40.5 years |
| #1,952 | Harvey County, KS | 40.5 years |
| #1,953 | Clark County, KY | 40.5 years |
| #1,954 | Grayson County, KY | 40.5 years |
About Median Age
Union County, Iowa has a median age of 40.5 years, ranking #1,951 of 3,222 counties nationwide — 4.1% above the national value of 38.9 years. Within Iowa, it ranks #70 of 99. This places it in the 39th percentile nationally.
The median age of the total population. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.