Median Age in Washington County, ID
ACS 2024 5-Year Estimates
45.0 years
Rank #742/3,222 · #12 in ID
77th
Washington 45.0 years
ID 37.3 years +20.6%
US 38.9 years +15.7%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Washington County's median age of 45.0 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 →| #739 | Quebradillas Municipio, PR | 45.1 years |
| #740 | Elbert County, CO | 45.0 years |
| #741 | Putnam County, FL | 45.0 years |
| #742 | Washington County, ID | 45.0 years |
| #743 | Owen County, IN | 45.0 years |
| #744 | Ballard County, KY | 45.0 years |
| #745 | Chase County, NE | 45.0 years |
About Median Age
Washington County, Idaho has a median age of 45.0 years, ranking #742 of 3,222 counties nationwide — 15.7% above the national value of 38.9 years. Within Idaho, it ranks #12 of 44. This places it in the 77th 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.