Colusa County, CA ZIP codes
There are 7 ZIP codes in Colusa County, CA, in 7 towns, from 95912 to 95987. The largest are 95932 (Colusa), 95987 (Williams) and 95912 (Arbuckle).
The county seat is Colusa.
- ZIP codes
- 7
- Towns
- 7
- County seat
- Colusa
- County FIPS
06011- State
- California
- Population
- 21,984
- Median household income
- $75,672
- Land area
- 1,151 sq mi
Colusa County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Colusa County ZIP codes
The ZIP codes of Colusa County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Colusa County in numbers
About 21,984 people live in Colusa County, in 7,512 households, the 50th most populous of California's 58 counties. The median household income is $75,672 a year, 24% below the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $393,400 (46% below the California median), and median gross rent is $1,157 a month. The median age is 35.9; 16.4% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 24 minutes.
| Population | 21,984 |
|---|---|
| Households | 7,512 |
| Median age | 35.9 |
| Median household income | $75,672 |
| Median home value | $393,400 |
| Median gross rent | $1,157 |
| Bachelor's degree or higher | 16.4% |
| Mean commute | 24.2 min |
| Population density | 19 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Colusa County
| Town | ZIP codes | Population |
|---|---|---|
| Colusa | 1 | 6,505 |
| Williams | 1 | 5,585 |
| Arbuckle | 1 | 3,093 |
| Maxwell | 1 | 1,245 |
| Princeton | 1 | 365 |
| Grimes | 1 | 280 |
| Stonyford | 1 | 111 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Colusa County.
Not sure you are in Colusa County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Colusa County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
95912 | Arbuckle , CA | Standard | 4,855 | $86,457 | $435,800 |
95932 | Colusa , CA | Standard | 7,701 | $66,964 | $389,600 |
95950 | Grimes , CA | Standard | 287 | — | — |
95955 | Maxwell , CA | Standard | 1,405 | — | $405,400 |
95970 | Princeton , CA | Standard | 453 | $69,000 | $371,400 |
95979 | Stonyford , CA | Standard | 558 | $24,766 | $184,400 |
95987 | Williams , CA | Standard | 6,786 | $95,122 | $388,700 |
Cite this page
zipcodes.pro. “Colusa County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ca/county/colusa
Underlying data is public domain or openly licensed — sources, vintages and licences.