Median Age in Alameda County, CA
ACS 2024 5-Year Estimates
39.0 years
Rank #2,377/3,222 · #33 in CA
26th
Alameda 39.0 years
CA 37.9 years +2.9%
US 38.9 years +0.3%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Alameda County's median age of 39.0 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 Alameda County for median age.
Nearby Rankings
Full ranking →| #2,374 | Autauga County, AL | 39.0 years |
| #2,375 | Coffee County, AL | 39.0 years |
| #2,376 | Bradley County, AR | 39.0 years |
| #2,377 | Alameda County, CA | 39.0 years |
| #2,378 | Owyhee County, ID | 39.0 years |
| #2,379 | Kankakee County, IL | 39.0 years |
| #2,380 | Knox County, IN | 39.0 years |
About Median Age
Alameda County, California has a median age of 39.0 years, ranking #2,377 of 3,222 counties nationwide — 0.3% above the national value of 38.9 years. Within California, it ranks #33 of 58. 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.