Median Age in Jefferson County, ID
ACS 2024 5-Year Estimates
32.8 years
Rank #3,085/3,222 · #41 in ID
4th
Jefferson 32.8 years
ID 37.3 years -12.1%
US 38.9 years -15.7%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Jefferson County's median age of 32.8 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 Jefferson County for median age.
Nearby Rankings
Full ranking →| #3,082 | Liberty County, TX | 32.9 years |
| #3,083 | Tuscaloosa County, AL | 32.8 years |
| #3,084 | Coconino County, AZ | 32.8 years |
| #3,085 | Jefferson County, ID | 32.8 years |
| #3,086 | Cass County, ND | 32.8 years |
| #3,087 | Custer County, OK | 32.8 years |
| #3,088 | Coryell County, TX | 32.8 years |
About Median Age
Jefferson County, Idaho has a median age of 32.8 years, ranking #3,085 of 3,222 counties nationwide — 15.7% below the national value of 38.9 years. Within Idaho, it ranks #41 of 44. This places it in the 4th 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.