Census-designated place · California
Rio Oso, California
Rio Oso, census-designated place, in Sutter County, California. Rio Oso had 372 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 437 (±133). GEOID 0660970.
Residents, 2020 Census
372
Census count or controlled total
ACS 2020-2024 estimate: 437 ±133
Median household income
$111,250
±$74,100 (90% margin)
California: $99,122
Median home value
$441,800
±$24,228 (90% margin)
California: $734,700
Median gross rent
$1,625
±$353 (90% margin)
California: $2,036
Where is Rio Oso and what county is it in?
Rio Oso is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Sutter County, California. It covers 6.5 square miles of land, 57 residents per square mile in 2020.
Rio Oso is in the Yuba City, CA metropolitan statistical area, which takes in 2 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Rio Oso, and is it growing?
The 2020 Census counted 372 residents in Rio Oso, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 437 (±133).
The Census Bureau publishes yearly population estimates for incorporated places only; Rio Oso is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Rio Oso | Sutter County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 437 ±133 | 98,857 | no clear change |
| Households | 141 ±43 | 33,292 | no clear change |
| Average household size | 3.10 ±0.62 | 2.94 | no clear change |
| Housing units | 162 ±44 | 34,798 | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Rio Oso?
The median resident of Rio Oso is 44.1 years old; 26.5% are under 18 and 23.6% are 65 or older. The largest group is non-Hispanic white residents at 73.5%, then Hispanic or Latino residents (of any race) at 10.3%. 10.8% of residents were born outside the United States.
| Measure | Rio Oso | Sutter County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 44.1 ±6.2 | 36.5 | no clear change |
| Under 18 years | 26.5% ±10.0 pts | 25.2% | – |
| 65 years and over | 23.6% ±6.4 pts | 16.4% | – |
| Male | 55.6% ±5.7 pts | 50.0% | – |
| Hispanic or Latino (any race) | 10.3% ±6.7 pts | 32.9% | – |
| White alone, not Hispanic | 73.5% ±11.5 pts | 40.7% | −14.8 pts |
| Black or African American alone, not Hispanic | 1.6% ±2.3 pts | 1.6% | – |
| Asian alone, not Hispanic | 10.3% ±7.0 pts | 17.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±9.3 pts | 0.7% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±9.3 pts | 0.4% | – |
| Two or more races, not Hispanic | 4.3% ±3.2 pts | 5.1% | – |
| Some other race alone, not Hispanic | 0.0% ±9.3 pts | 1.2% | – |
| Born outside the United States | 10.8% ±6.9 pts | 22.7% | no clear change |
| Speak a language other than English at home (age 5+) | 14.7% ±8.5 pts | 36.9% | – |
| Civilian veterans (age 18+) | 5.3% ±3.0 pts | 6.5% | – |
| With a disability | 11.0% ±4.6 pts | 15.0% | – |
| No health insurance coverage | 0.5% ±0.8 pts | 6.4% | – |
| High school graduate or higher (age 25+) | 87.8% ±5.7 pts | 80.2% | – |
| Bachelor's degree or higher (age 25+) | 19.0% ±8.1 pts | 20.9% | −15.1 pts |
| Graduate or professional degree (age 25+) | 4.1% ±2.4 pts | 6.6% | – |
| Lived in the same house a year earlier | 92.4% ±5.2 pts | 88.8% | – |
| Moved from another state in the past year | 0.0% ±9.3 pts | 0.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Rio Oso earn?
Rio Oso's median household income is published as $111,250 with a margin of ±$74,100, too wide to rely on.
| Measure | Rio Oso | Sutter County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $111,250 ±$74,100 | $79,704 | – |
| Mean household income | $141,635 ±$37,289 | $108,245 | – |
| Per capita income | $44,710 ±$6,733 | $36,107 | no clear change |
| People below the poverty line | 4.1% ±3.7 pts | 14.4% | – |
| Children under 18 below the poverty line | 0.0% ±29.8 pts | 19.8% | – |
| Households receiving SNAP | 0.7% ±1.7 pts | 13.2% | – |
| Households with a computer | 100.0% ±25.6 pts | 95.6% | – |
| Households with a broadband subscription | 84.4% ±11.1 pts | 90.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Rio Oso?
Owners occupy 84.4% of Rio Oso's occupied homes and renters 15.6%. The median owner-occupied home is valued at $441,800 by its owner (±$24,228). The median renter pays $1,625 a month including utilities, and 80.0% of renters pay 35% or more of their income on rent.
| Measure | Rio Oso | Sutter County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $441,800 ±$24,228 | $433,500 | no clear change |
| Median gross rent | $1,625 ±$353 | $1,439 | no clear change |
| Renters paying 35% or more of income on rent | 80.0% ±22.2 pts | 44.0% | – |
| Median monthly owner costs, with a mortgage | $2,871 ±$170 | $2,116 | – |
| Owner-occupied homes | 84.4% ±9.5 pts | 61.3% | no clear change |
| Renter-occupied homes | 15.6% ±9.5 pts | 38.7% | – |
| Housing units | 162 ±44 | 34,798 | no clear change |
| Homeowner vacancy rate | 0.0% ±29.2 pts | 0.5% | – |
| Rental vacancy rate | 0.0% ±72.3 pts | 2.1% | – |
| Single-family detached homes | 65.4% ±13.1 pts | 72.4% | – |
| Mobile homes | 22.2% ±10.3 pts | 4.7% | – |
| Built 2020 or later | 0.0% ±22.8 pts | 0.2% | – |
| Built 2010 to 2019 | 1.9% ±2.8 pts | 5.1% | – |
| Built 1939 or earlier | 4.3% ±6.6 pts | 5.4% | – |
| Households with no vehicle | 0.0% ±25.6 pts | 5.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Rio Oso work and get to work?
68.9% of Rio Oso's workers drive alone and 18.2% work from home. The average trip to work takes 27.2 minutes.
| Measure | Rio Oso | Sutter County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 62.0% ±7.5 pts | 60.6% | – |
| Unemployment rate | 4.6% ±4.9 pts | 7.2% | – |
| Drove alone to work | 68.9% ±12.0 pts | 75.5% | – |
| Carpooled | 7.7% ±5.1 pts | 13.8% | – |
| Public transportation | 0.0% ±18.3 pts | 0.6% | – |
| Walked | 5.3% ±6.3 pts | 1.1% | – |
| Worked from home | 18.2% ±8.9 pts | 7.7% | – |
| Mean travel time to work | 27.2 min ±4.5 | 27.1 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Rio Oso?
No census tract lies mostly in Rio Oso; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 511Sutter County | 2,339 | $102,500 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Rio Oso) · Census block assignment files
How does Rio Oso compare with other places in California?
Rio Oso is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
Rio Oso's figures with every place in California (CSV)
Every place in California, sortable · Compare Rio Oso with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Rio Oso?
22 of the 57 figures for Rio Oso on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Rio Oso are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.