Total Population in San Diego County, CA
ACS 2024 5-Year Estimates
How San Diego County Compares
National Distribution
Where San Diego County falls among all 3,222 U.S. counties for total population.
■ San Diego County: 3,288,774
Ranking Context
| Rank | County | Value |
|---|---|---|
| #2 | Cook County, IL | 5,182,090 |
| #3 | Harris County, TX | 4,838,303 |
| #4 | Maricopa County, AZ | 4,559,748 |
| #5 | San Diego County, CA | 3,288,774 |
| #6 | Orange County, CA | 3,165,820 |
| #7 | Miami-Dade County, FL | 2,738,356 |
| #8 | Kings County, NY | 2,631,580 |
Total Population in San Diego County, California
San Diego County, California has a total population of 3,288,774, which ranks #5 of 3,222 out of 3,222 counties nationwide. This is 99.0% below the national value of 330M.
Within California, San Diego County ranks #2 of 58 out of 58 counties. This places it in the 100th percentile nationally.
Total population count from the American Community Survey. 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.