Median Age in Washington County, IA
ACS 2024 5-Year Estimates
40.7 years
Rank #1,890/3,222 · #68 in IA
41th
Washington 40.7 years
IA 38.6 years +5.4%
US 38.9 years +4.6%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Washington County's median age of 40.7 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 Washington County for median age.
Nearby Rankings
Full ranking →| #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 |
| #1,892 | Larue County, KY | 40.7 years |
| #1,893 | Lincoln County, KY | 40.7 years |
About Median Age
Washington County, Iowa has a median age of 40.7 years, ranking #1,890 of 3,222 counties nationwide — 4.6% above the national value of 38.9 years. Within Iowa, it ranks #68 of 99. This places it in the 41th 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.