San Mateo City Clerk 330 W 20th Ave San Mateo, CA 94403 Phone : (650) 522-7040 Business Category Government Offices & Public Schools San Mateo City Of--city Clerk San Mateo, CA 94401 Phone : (650) 522-7040 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools