Colusa County, county in California, United States. As of 2020 county had an estimated population of 21,558 inhabitants. The county was created 172 years ago in 1850. Its county seat is "Colusa".
Cities, Towns, Neighborhoods & Other Populated Places in Colusa County.
|Arbuckle||Census-designated place in Colusa County, California||Colusa||3,028|
|Colusa||City of California||Colusa||6,098|
|Williams||City in Colusa County, California, United States||Colusa||5,400|