Below is a list of Geyserville CA zip codes. For your research we have also included Geyserville Area Code, Time Zone, UTC and the local Sonoma County FIPS Code. Each Geyserville California zip code has a center Longitude / Latitude point (the Geyserville center is -122.90299987793 / 38.707698822021). For your convenience we have also indicated if that zip code in Geyserville observes Daylight Savings time.