Below is a list of Mill Valley CA zip codes. For your research we have also included Mill Valley Area Code, Time Zone, UTC and the local Marin County FIPS Code. Each Mill Valley California zip code has a center Longitude / Latitude point (the Mill Valley center is -122.54199981689 / 37.904499053955). For your convenience we have also indicated if that zip code in Mill Valley observes Daylight Savings time.