Treasurer - Tax Collector - County Clerk 675 Texas Street, Suite 1900 Fairfield, CA 94533 Treasurer : 707-784-6295 Tax Collector : 707-784-7485 County Clerk : 707-784-7485 TTCCC@Solanocounty.gov For office and phone hours please see the division (Treasurer, Tax Collector or County Clerk) General Information page Please Note: Public access counters are located in the Tax Collector Lobby. Directions