Rio Oso CDP, California Demographics & Population 2026

Population Overview

Rio Oso CDP is a small community located in California. The total population is 421. It ranks as the 1258th most populous out of 1,577 cities and towns in California.

Age Demographics

The median age in Rio Oso CDP is 36.1 years. This is 4% lower than the state median of 37.6 years. With 35.6% of the population under 18, Rio Oso CDP has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Rio Oso CDP is $172,500. This is 79% higher than the state median of $96,334. Compared to the national median of $78,538, household income here is 120% higher. The poverty rate stands at 3.8%. This is 68% lower than the state poverty rate of 12.0%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 4.5%. This is 29% lower than the state rate of 6.4%. The median home value is $478,800. Housing costs are 31% lower than the state median of $695,400. With a home-value-to-income ratio of just 2.8x, Rio Oso CDP is one of the most affordable housing markets in the area. 88.5% of occupied housing units are owner-occupied. This homeownership rate is 59% higher than the state average of 55.8%.

Race & Ethnicity

The largest racial or ethnic group in Rio Oso CDP is White (non-Hispanic), making up 81.7% of the population. Asian residents account for 7.8%. The White (non-Hispanic) population is significantly higher than the state average (81.7% vs 34.6%). The Black or African American population (1.2%) is well below the state average of 5.3%. The Hispanic or Latino population (5.9%) is well below the state average of 39.8%.

Education

23.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 36% lower than the state rate of 36.5%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.7%.

Data Sources & Methodology

All demographic data for Rio Oso CDP, California is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,577 Census-designated places in California. For official data, visit data.census.gov.