Below is a list of Forest Knolls CA zip codes. For your research we have also included Forest Knolls Area Code, Time Zone, UTC and the local Marin County FIPS Code. Each Forest Knolls California zip code has a center Longitude / Latitude point (the Forest Knolls center is -122.68800354004 / 38.015300750732). For your convenience we have also indicated if that zip code in Forest Knolls observes Daylight Savings time.