Median Age in Fairfax County, VA
ACS 2024 5-Year Estimates
39.1 years
Rank #2,372/3,222 · #92 in VA
26th
Fairfax 39.1 years
VA 39.0 years +0.3%
US 38.9 years +0.5%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Fairfax County's median age of 39.1 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 Fairfax County for median age.
Nearby Rankings
Full ranking →| #2,369 | Rusk County, TX | 39.1 years |
| #2,370 | Washington County, UT | 39.1 years |
| #2,371 | Culpeper County, VA | 39.1 years |
| #2,372 | Fairfax County, VA | 39.1 years |
| #2,373 | Clark County, WA | 39.1 years |
| #2,374 | Autauga County, AL | 39.0 years |
| #2,375 | Coffee County, AL | 39.0 years |
About Median Age
Fairfax County, Virginia has a median age of 39.1 years, ranking #2,372 of 3,222 counties nationwide — 0.5% above the national value of 38.9 years. Within Virginia, it ranks #92 of 133. This places it in the 26th 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.