USGenWeb Project - Extensive listing of historical documents, resources, maps and records for the county. - http://cagenweb.com/colusa/
Colusa County Clerk - Office of the County Clerk and Recorder. Services, election precinct maps and list of archival records. - http://www.colusacountyclerk.com/
Colusa County Superior Court - Description of history and current facilities, including photos and directions for the Main Courthouse and Courthouse Annex. - http://www.courtinfo.ca.gov/courts/trial/colusa/
Colusa County Farm Bureau - Information for members, young farmers and ranchers, board of directors, and economic data. - http://www.ccfb.com/
Colusa County Radio Information - Local radio and frequency information for fire and prevention, law enforcement, and miscellaneous frequencies. - http://www.norcalscan.org/colusa/