Colusa County, California

Colusa County, California
County of Colusa
Colusa County Courthouse
Interactive map of Colusa County
Location in the state of California
CountryUnited States
StateCalifornia
RegionSacramento Valley
IncorporatedFebruary 18, 1850
Named afterRancho Colus
County seatColusa
Largest cityColusa (population)
Williams (area)
Government
  TypeCouncil–CAO
  ChairGary J. Evans
  Vice ChairDaurice Kalfsbeek Smith
  Board of Supervisors
Supervisors
  • Jose Merced Corona
  • Daurice Kalfsbeek Smith
  • Kent S. Boes
  • Gary J. Evans
  • Janice Bell
  County Administrative OfficerWendy G. Tyler
Area
  Total
1,156 sq mi (2,990 km2)
  Land1,151 sq mi (2,980 km2)
  Water5.6 sq mi (15 km2)
Highest elevation
7,059 ft (2,152 m)
Population
 (2020)
  Total
21,839
  Density19/sq mi (7.3/km2)
GDP
  Total$1.781 billion (2022)
Time zoneUTC-8 (Pacific Time Zone)
  Summer (DST)UTC-7 (Pacific Daylight Time)
Area code530
Congressional district1st
Websitewww.countyofcolusa.org

Colusa County (/kəˈlsə/ ) is a county located in the U.S. state of California. As of the 2020 census, the population was 21,839. The county seat is Colusa. It is in the northern Sacramento Valley, northwest of the state capital, Sacramento.