Colusa County, California
Colusa County, California, has 21,836 residents (July 2025 estimate). Its county seat is Colusa. It uses Pacific Time and covers 1,151 sq mi (2,980 km²) of land.
- Resident population, July 2025
- 21,836
- Land area
- 1,151 sq mi (2,980 km²)
- County seat or government
- Colusa
- Time zone
- Pacific TimeUTC-08:00 in January; UTC-07:00 in July
- Median household income
- $75,672 ± $6,385
- Median home value
- $393,400 ± $24,633
- Median rent, with utilities
- $1,157 ± $69
- Homes lived in by their owners
- 62.2% ± 4.0 points
- County type
- County
- Metro or micro area
- Outside any metro or micro areaNext to: Clearlake, CA micro area, Yuba City, CA metro area, Chico, CA metro area, and Sacramento-Roseville-Folsom, CA metro area
- Water area
- 5.7 sq mi (14.8 km²)
- State
- California
- County code (FIPS)
- 06011
- Coordinates (central point)
- 39.177739, -122.237563
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Colusa County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Pacific TimeAmerica/Los_Angeles | UTC-08:00 in January; UTC-07:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 959327,701 people
- 959876,786 people
- 959124,855 people
- 959551,405 people
- 956451,314 people
- 95957680 people
- 95979558 people
- 95970453 people
- 95950287 people
9 ZIP Code areas overlap Colusa County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
Colusa County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Colusa County, largest first
- Colusa Unified School District7,640 people
- Williams Unified School District6,769 people
- Pierce Joint Unified School District5,862 people
- Maxwell Unified School District1,803 people
- Princeton Joint Unified School District906 people
- Stony Creek Joint Unified School District520 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Tribal areas in Colusa County, largest first
- Colusa Rancheria81 people
- Cortina Indian Rancheria10 people
American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Colusa, California (city)6,505 people
- Williams, California (city)5,585 people
- Arbuckle, California (CDP)3,093 people
- Maxwell, California (CDP)1,245 people
- College City, California (CDP)557 people
- Princeton, California (CDP)365 people
- Grimes, California (CDP)280 people
- Lodoga, California (CDP)259 people
- Stonyford, California (CDP)111 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Lake County, California28 mi west
- Sutter County, California30 mi east
- Glenn County, California31 mi north
- Yolo County, California39 mi southeast
- Butte County, California48 mi northeast
Before using this answer on a form
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