How San Diego County Compares

San Diego County

37.3 years

California Average

37.3 years

Rank #38 of 58 in state

National

38.9 years

4.1% below

National Distribution

Where San Diego County falls among all 3,222 U.S. counties for median age.

21.4 years 86.2 years

■ San Diego County: 37.3 years

Ranking Context

Rank	County	Value
#2,693	Knox County, TN	37.4 years
#2,694	King County, WA	37.4 years
#2,695	Mississippi County, AR	37.3 years
#2,696	San Diego County, CA	37.3 years
#2,697	Arapahoe County, CO	37.3 years
#2,698	Lake County, CO	37.3 years
#2,699	Toombs County, GA	37.3 years

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Median Age in San Diego County, California

San Diego County, California has a median age of 37.3 years, which ranks #2,696 of 3,222 out of 3,222 counties nationwide. This is 4.1% below the national value of 38.9 years.

Within California, San Diego County ranks #38 of 58 out of 58 counties. This places it in the 16th percentile nationally.

The median age of the total population. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.

About this data

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.