what county is colusa ca in
Colusa, California. Colusa (formerly, Colusi, Colusi's, Koru, and Salmon Bend) is the county seat of Colusa County, California. The population was 5,971 at the 2010 census, up from 5,402 at the 2000 census. Colusi originates from the local Coru Indian tribe, who in the 1840s lived on the opposite side of the Sacramento River.