Total Population in Marin County, CA
ACS 2024 5-Year Estimates
257,969
Rank #279/3,222 · #26 in CA
91th
Marin 257,969
CA 39M -99.3%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Marin County's total population of 257,969 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to Marin County for total population.
Nearby Rankings
Full ranking →| #276 | Kalamazoo County, MI | 262,375 |
| #277 | Williamson County, TN | 260,351 |
| #278 | Clay County, MO | 258,122 |
| #279 | Marin County, CA | 257,969 |
| #280 | Yakima County, WA | 257,152 |
| #281 | Washington County, AR | 256,765 |
| #282 | Sussex County, DE | 255,626 |
About Total Population
Marin County, California has a total population of 257,969, ranking #279 of 3,222 counties nationwide — 99.9% below the national value of 330M. Within California, it ranks #26 of 58. This places it in the 91th percentile nationally.
Total population count from the American Community Survey. 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.