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Colusa County, California

Colusa County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF
Government Unit Unit Type Jurisdiction Role Contact / Address
GUS Population: 22,074 (2024)
ID: 100617
County Official County Government
Contact: SUPERVISOR VICE CHAIR
547 JAY ST, STE 102, COLUSA CA 95932
GUS Population: 6,589 (2024)
ID: 207579
Municipal Municipal Government Within County
Contact: FINANCE DEPARTMENT
425 WEBSTER ST, COLUSA CA 95932-2624
GUS Population: 5,598 (2024)
ID: 161131
Municipal Municipal Government Within County
Contact: DEPUTY CITY CLERK/HUMAN RESOURCES MA
PO BOX 310, WILLIAMS CA 95987-0310