San Luis Obispo, California Demographics & Population 2026

Population Overview

San Luis Obispo is a mid-sized community located in California, within San Luis Obispo County. The total population is 48,491. It ranks as the 194th most populous out of 1,570 Census-designated places in California.

Age Demographics

The median age in San Luis Obispo is 26.3 years. This is 31% lower than the state median of 37.9 years. Only 10.3% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in San Luis Obispo is $73,685. This is 26% lower than the state median of $99,122. It is also 9% lower than the national median of $80,734. The poverty rate stands at 30.4%. This is 153% higher than the state poverty rate of 12.0%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 7.0%. This is 6% higher than the state rate of 6.6%. The median home value is $935,100. Housing costs are 27% higher than the state median of $734,700. The home-value-to-income ratio of 12.7x suggests that housing affordability is a significant concern for many residents. 40.3% of occupied housing units are owner-occupied. This homeownership rate is 28% lower than the state average of 55.9%.

Race & Ethnicity

The largest racial or ethnic group in San Luis Obispo is White (non-Hispanic), making up 69.1% of the population. Hispanic or Latino residents account for 18.4%. The White (non-Hispanic) population is significantly higher than the state average (69.1% vs 33.8%). The Black or African American population (1.2%) is well below the state average of 5.2%. The Hispanic or Latino population (18.4%) is well below the state average of 40.2%. The Asian population (5.3%) is well below the state average of 15.3%.

Education

54.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 47% higher than the state rate of 37.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 96.6%. Notably, 24.1% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for San Luis Obispo, California is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,570 Census-designated places in California. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.