County · California
Colusa County, California
Colusa County, California. Colusa County had 21,836 residents in 2025 by the Census Bureau's estimate, about level with 2020, faster than California (−0.5%). It holds 9 places (2 cities, villages and boroughs and 7 census-designated) and 6 census tracts. GEOID 06011.
Residents, July 2025 estimate
21,836
Census Bureau estimate (no margin published)
2020 Census count: 21,839 · ACS 2020-2024: 21,984
Median household income
$75,672
±$6,385 (90% margin)
California: $99,122
Median home value
$393,400
±$24,633 (90% margin)
California: $734,700
Median gross rent
$1,157
±$69 (90% margin)
California: $2,036
How many people live in Colusa County, and is it growing?
The 2020 Census counted 21,839 residents in Colusa County. The Census Bureau estimates 21,836 for July 1, 2025, about level with 2020, faster than California (−0.5%). The 2020-2024 American Community Survey puts the population at 21,984 over 1,151 square miles of land.
| Measure | Colusa County | California | Change since 2015-2019 |
|---|---|---|---|
| Total population | 21,984 | 39,287,377 | +530 |
| Households | 7,512±369 | 13,548,091 | no clear change |
| Average household size | 2.89±0.13 | 2.84 | no clear change |
| Housing units | 8,211±359 | 14,644,735 | no clear change |
Colusa County's population since 2000
From 18,804 in 2000 to 21,836 in 2025: up 16.1%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Colusa County?
Colusa County holds 9 places: 2 cities, villages and boroughs (incorporated places) and 7 census-designated places. The largest is Colusa with 6,519 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Colusa | 6,411 | $71,250 |
|---|---|---|
| Williams | 5,538 | $90,761 |
| Arbuckle | 3,484 | $86,942 |
| Maxwell | 1,067 | $67,768 |
| Princeton | 309 | $53,750 |
| GrimesGEOID 0631288 | 296 | not published |
| College CityGEOID 0614554 | 292 | $67,206 |
| LodogaGEOID 0642230 | 184 | $63,333 |
| StonyfordGEOID 0675154 | 133 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Colusa County?
The median resident of Colusa County is 35.9 years old; 26.9% are under 18 and 15.5% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 62.9%, then non-Hispanic white residents at 29.8%. 27.5% of residents were born outside the United States.
| Measure | Colusa County | California | Change since 2015-2019 |
|---|---|---|---|
| Median age | 35.9±0.7 | 37.9 | no clear change |
| Under 18 years | 26.9%±0.7 pts | 22.0% | – |
| 65 years and over | 15.5%±0.7 pts | 15.7% | – |
| Hispanic or Latino (any race) | 62.9% | 40.2% | +3.5 pts |
| White alone, not Hispanic | 29.8%±1.1 pts | 33.8% | −5.5 pts |
| Black or African American alone, not Hispanic | 1.5%±0.1 pts | 5.2% | +0.3 pts |
| Asian alone, not Hispanic | 0.9%±1.3 pts | 15.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.5%±0.4 pts | 0.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.1%±0.1 pts | 0.3% | – |
| Two or more races, not Hispanic | 2.5%±1.4 pts | 4.4% | – |
| Some other race alone, not Hispanic | 1.7%±1.1 pts | 0.6% | – |
| Born outside the United States | 27.5%±2.9 pts | 27.0% | no clear change |
| Speak a language other than English at home (age 5+) | 53.1%±3.0 pts | 44.4% | – |
| Civilian veterans (age 18+) | 4.5%±1.3 pts | 4.3% | – |
| With a disability | 12.1%±1.4 pts | 11.6% | – |
| No health insurance coverage | 8.0%±2.1 pts | 6.6% | no clear change |
| High school graduate or higher (age 25+) | 74.2%±3.5 pts | 84.7% | – |
| Bachelor's degree or higher (age 25+) | 16.4%±3.3 pts | 37.1% | no clear change |
| Graduate or professional degree (age 25+) | 4.4%±1.2 pts | 14.4% | – |
| Moved from another state in the past year | 0.2%±0.2 pts | 1.1% | – |
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 Colusa County earn?
Half of Colusa County's 7,512 households earn less than $75,672 a year (±$6,385), against $99,122 in California. In 2015-2019 it was $73,104 in 2024 dollars; the margins of error cannot tell the two periods apart. 11.4% of residents live below the poverty line.
| Measure | Colusa County | California | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $75,672±$6,385 | $99,122 | no clear change |
| Mean household income | $95,368±$9,213 | $140,436 | – |
| Per capita income | $33,882±$2,882 | $49,513 | no clear change |
| People below the poverty line | 11.4%±3.0 pts | 12.0% | no clear change |
| Children under 18 below the poverty line | 12.6%±4.8 pts | 15.0% | no clear change |
| Households receiving SNAP | 16.4%±3.7 pts | 12.4% | – |
| Households with a broadband subscription | 84.6%±3.0 pts | 93.5% | – |
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 Colusa County?
Owners occupy 62.2% of Colusa County's occupied homes and renters 37.8%. The median owner-occupied home is valued at $393,400 by its owner (±$24,633). The median renter pays $1,157 a month including utilities, and 45.8% of renters pay 35% or more of their income on rent.
| Measure | Colusa County | California | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $393,400±$24,633 | $734,700 | +$67,020 |
| Median gross rent | $1,157±$69 | $2,036 | no clear change |
| Renters paying 35% or more of income on rent | 45.8%±8.8 pts | 46.0% | no clear change |
| Median monthly owner costs, with a mortgage | $2,048±$237 | $2,946 | – |
| Owner-occupied homes | 62.2%±4.5 pts | 55.9% | no clear change |
| Housing units | 8,211±359 | 14,644,735 | no clear change |
| Homeowner vacancy rate | 2.4%±2.3 pts | 0.8% | – |
| Rental vacancy rate | 1.3%±1.5 pts | 4.2% | – |
| Single-family detached homes | 80.4%±3.4 pts | 57.0% | – |
| Mobile homes | 5.1%±1.9 pts | 3.5% | – |
| Built 2020 or later | 1.1%±1.2 pts | 1.3% | – |
| Built 1939 or earlier | 14.1%±3.0 pts | 8.9% | – |
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 many new homes is Colusa County building?
Builders took permits for 17 new housing units across Colusa County in 2025 (13 single-family), 0.8 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Colusa County get to work?
82.1% of Colusa County's workers drive alone and 5.3% work from home. The average trip to work takes 24.2 minutes. The unemployment rate in 2020-2024 averaged 9.8%.
| Measure | Colusa County | California | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 63.0%±2.8 pts | 63.8% | – |
| Unemployment rate | 9.8%±2.5 pts | 6.6% | +5.5 pts |
| Drove alone to work | 82.1%±3.8 pts | 65.7% | – |
| Carpooled | 10.1%±2.7 pts | 9.5% | – |
| Public transportation | 0.8%±0.8 pts | 2.9% | – |
| Walked | 0.7%±0.5 pts | 2.4% | – |
| Worked from home | 5.3%±1.8 pts | 17.2% | no clear change |
| Mean travel time to work | 24.2 min±2.2 | 28.7 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 are Colusa County's census tracts?
Colusa County is divided into 6 census tracts. Among those with a reliable estimate, median household income runs from $42,011 (Tract 4) to $99,045 (Tract 3.02).
| Tract 106011000100 | 5,151±590 | $85,890 |
|---|---|---|
| Tract 206011000200 | 5,307±497 | $66,148 |
| Tract 3.0106011000301 | 4,197±623 | $83,774 |
| Tract 3.0206011000302 | 2,592±477 | $99,045 |
| Tract 406011000400 | 2,411±421 | $42,011 |
| Tract 506011000500 | 2,326±354 | $70,709 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Colusa County compare with California's other counties?
| Measure | Rank |
|---|---|
| Population | 50th of 58 |
| Growth 2020-2025 | 22nd of 58 |
| Residents per square mile | 48th of 58 |
| Median household income | 36th of 58 |
| Median home value | 38th of 58 |
| Median gross rent | 50th of 56 |
| Poverty rate | 34th of 57 |
| Bachelor's degree or higher | 53rd of 58 |
| Median age | 44th of 58 |
Source: PlainCities ranks 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 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 Colusa County 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.