Below is a list of San Quentin CA zip codes. For your research we have also included San Quentin Area Code, Time Zone, UTC and the local Marin County FIPS Code. Each San Quentin California zip code has a center Longitude / Latitude point (the San Quentin center is -122.48000335693 / 37.943500518799). For your convenience we have also indicated if that zip code in San Quentin observes Daylight Savings time.