Superior Court of Colusa in Superior court Here are all of the Superior court located in the Colusa County. Colusa County Superior CourtPhysical: Main Courthouse547 Market Street, Colusa, CA 95932Mailing: 532 Oak Street, Colusa, CA 95932Phone: 530-458-5149Fax: 530-458-2230 Colusa County Superior CourtCourthouse Annex532 Oak Street, Colusa, CA 95932Phone: 530-458-5149Fax: 530-458-2230