San Luis Obispo County, California

San Luis Obispo County, California, had an estimated population of 282,367 in 2025 across 8,549 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among California's counties and nationally.

Population: 282,367; 2025 estimate
Area: 8,549 km²
Density: 33; per km²
Median income: $97,446; household, ACS 2024
Median age: 40.4; years, ACS 2024

How California's counties spread

Amenities & Infrastructure

Indicator	Value	In California	In the US
Households with Broadband2024	93.1%	19 / 58	251 / 3,144
Median Gross Rent2024	$1,992	17 / 56	48 / 3,137
Median Home Value2024	$824,700	12 / 58	28 / 3,139
Owner-Occupied Homes2024	62.1%	32 / 58	2,825 / 3,144
Vacant Homes2024	12.9%	20 / 58	1,736 / 3,144

Demography

Indicator	Value	In California	In the US
Aged 65 and Over2024	22.1%	16 / 58	962 / 3,144
American Indian & Alaska Native2024	0.1%	51 / 58	1,566 / 3,144
Asian, non-Hispanic2024	3.4%	34 / 58	300 / 3,144
Average Household Size2024people	2.4	46 / 58	1,520 / 3,144
Black, non-Hispanic2024	1.1%	41 / 58	1,939 / 3,144
Foreign-Born2024	9.9%	39 / 58	394 / 3,144
Hispanic or Latino2024	25.0%	32 / 58	328 / 3,144
Median Age2024years	40.4	23 / 58	1,899 / 3,144
Sex Ratio2024per 1,000 males	983	39 / 58	1,962 / 3,144
Speak a Language Other Than English2024	17.5%	41 / 58	464 / 3,144
Under 182024	17.5%	49 / 58	2,812 / 3,144
Veterans2024	6.3%	24 / 58	2,146 / 3,144
White, non-Hispanic2024	64.5%	18 / 58	2,247 / 3,144

Economy

Indicator	Value	In California	In the US
Below Poverty Line2024	12.9%	28 / 58	1,630 / 3,144
Households on SNAP2024	8.2%	49 / 58	2,279 / 3,144
Income Inequality2024index	0.475	21 / 58	645 / 3,144
Median Household Income2024	$97,446	20 / 58	193 / 3,143
Per Capita Income2024	$51,592	16 / 58	195 / 3,144
Unemployment Rate2024	5.5%	43 / 58	839 / 3,144

Education

Indicator	Value	In California	In the US
Bachelor's Degree or Higher2024	39.8%	15 / 58	279 / 3,144
High School or Higher2024	92.2%	11 / 58	1,011 / 3,144

Health Coverage

Indicator	Value	In California	In the US
No Health Insurance2024	5.7%	35 / 58	2,250 / 3,144
With a Disability2024	13.3%	26 / 58	2,357 / 3,144

Population & Density

Indicator	Value	In California	In the US
Population2025	282,367	24 / 58	260 / 3,144
Population Density2025/km²	33	34 / 58	1,021 / 3,144

Work & Commute

Indicator	Value	In California	In the US
Commute by Public Transit2024	0.6%	32 / 58	681 / 3,144
Households with No Vehicle2024	3.8%	55 / 58	2,416 / 3,144
Mean Commute Time2024minutes	22.3	46 / 58	1,983 / 3,143
Work from Home2024	15.2%	23 / 58	404 / 3,144

Other counties of California

Compare San Luis Obispo County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.