County
Colusa County
This is the county layer. It is often the first stop for assessor, tax collector, recorder, court, social service, election, health, sheriff, and unincorporated-area services.
Starting point
Start with the county layer.
County offices are the usual first stop for records, taxes, courts, elections, public health, social services, sheriff services, and unincorporated-area routing.
Cities inside the county can still control city permits, local code, utilities, business licenses, and city-specific rules.
2025 population
21,836
Land area
1,150.639 sq mi
Water area
5.703 sq mi
Directory notes
Local layers to keep on the same page.
Property, taxes, and records
For assessed value, exemptions, ownership records, recording, and tax bills, county offices are usually the starting layer.
Unincorporated land
If an address is outside city limits, county planning, building, environmental health, fire, or public works may handle local permits and code work.
Courts, services, and alerts
Superior court, sheriff, elections, social services, emergency alerts, and health offices often start at the county level.
Practical notes
Office, map, permit, and paperwork notes for Colusa County
Almanac notes
Stories and local context near Colusa County
Place note · Outdoors
Colusa National Wildlife Refuge turns valley fields into a bird stop
Colusa National Wildlife Refuge gives Colusa County an easy way to see Sacramento Valley wetlands, winter birds, and an auto tour close to farm country.
Place note · History and culture
Williams turned its old high school into a valley museum
Williams is home to the Sacramento Valley Museum, a former 1911 high school that now tells regional farm, family, school, and valley history.