Total Population in San Luis Obispo County, CA
ACS 2024 5-Year Estimates
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How San Luis Obispo County's total population of 281,555 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 San Luis Obispo County for total population.
Nearby Rankings
Full ranking →| #253 | Alachua County, FL | 285,492 |
| #254 | Ingham County, MI | 283,913 |
| #255 | Winnebago County, IL | 283,292 |
| #256 | San Luis Obispo County, CA | 281,555 |
| #257 | Cherokee County, GA | 281,032 |
| #258 | Southeastern Connecticut Planning Region, CT | 279,971 |
| #259 | Kitsap County, WA | 277,881 |
About Total Population
San Luis Obispo County, California has a total population of 281,555, ranking #256 of 3,222 counties nationwide — 99.9% below the national value of 330M. Within California, it ranks #24 of 58. This places it in the 92th 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.