Rio Oso, California Demographics & Population 2026
During the 2020–2024 ACS period, Rio Oso, California had a total population of 437, the 1249th largest community in California, with a median household income of $111,250, which is 12% higher than the state average. The poverty rate is 4.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- An exceptionally low poverty rate of 4.1% — among the lowest in California.
Rio Oso Quick Facts
How Rio Oso Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 421 | 437 | +3.8% |
| Median household income | $172,500 | $111,250 | -35.5% |
| Median home value | $478,800 | $441,800 | -7.7% |
How Rio Oso Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 70 | National average: 61
Education
Educational Attainment (Adults 25+)
Rio Oso Rankings in California
Explore California Rankings
Other Cities in Sutter County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Yuba City | 69,471 | $75,477 | 14.3% | $434,600 |
| Live Oak | 9,347 | $73,571 | 17.4% | $350,700 |
| Sutter | 2,532 | $96,173 | 6.8% | $408,500 |
| Meridian | 319 | $68,333 | 14.7% | $316,700 |
| Trowbridge | 243 | $130,000 | 5.3% | $621,700 |
| Robbins | 210 | $93,375 | 0.0% | $393,800 |
| East Nicolaus | 110 | N/A | 19.1% | $450,000 |
| Nicolaus | 102 | N/A | 8.8% | $496,400 |
Cities Similar to Rio Oso
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Iron Horse | 434 | N/A | $315,500 | 23.0% | 0.0% |
| Tonyville | 433 | N/A | N/A | 0.0% | 49.9% |
| Edison | 449 | N/A | N/A | 4.3% | 52.6% |
| Paloma | 450 | N/A | $427,000 | 0.0% | 0.0% |
| Greenville | 424 | N/A | $241,200 | 8.8% | 6.1% |
A note before these figures: with a population of 437, Rio Oso's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Rio Oso is a small community located in California, within Sutter County. The total population is 437. It ranks as the 1249th most populous out of 1,570 Census-designated places in California.
Age Demographics
The median age in Rio Oso is 44.1 years. This is 16% higher than the state median of 37.9 years.
Economy, Income & Housing
The median household income in Rio Oso is $111,250. This is 12% higher than the state median of $99,122. It is also 38% higher than the national median of $80,734. The poverty rate stands at 4.1%. This is 66% 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 4.6%. This is 31% lower than the state rate of 6.6%. The median home value is $441,800. Housing costs are 40% lower than the state median of $734,700. The home-value-to-income ratio is 4.0x. 84.4% of occupied housing units are owner-occupied. This homeownership rate is 51% higher than the state average of 55.9%.
Race & Ethnicity
The largest racial or ethnic group in Rio Oso is White (non-Hispanic), making up 73.5% of the population. Hispanic or Latino residents account for 10.3%. The White (non-Hispanic) population is significantly higher than the state average (73.5% vs 33.8%). The Black or African American population (1.6%) is well below the state average of 5.2%. The Hispanic or Latino population (10.3%) is well below the state average of 40.2%.
Education
19.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 49% lower 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 87.8%.
Data Sources & Methodology
All demographic data for Rio Oso, 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.
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Frequently Asked Questions
What is the population of Rio Oso, California?
Rio Oso, California has a population of 437 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Rio Oso, CA?
The median household income in Rio Oso is $111,250, which is 38% higher than the national median of $80,734.
What is the poverty rate in Rio Oso, CA?
The poverty rate in Rio Oso is 4.1%. This means approximately 18 residents live below the federal poverty line.
What is the racial makeup of Rio Oso, California?
Rio Oso's population is 73.5% White, 1.6% Black, 10.3% Hispanic/Latino, and 10.3% Asian.
What is the median home value in Rio Oso, CA?
The median home value in Rio Oso is $441,800. The home-value-to-income ratio is 4.0x.
How educated is Rio Oso, California?
19.1% of adults (25+) in Rio Oso hold a bachelor's degree or higher, and 4.1% hold a graduate or professional degree.