Below is a list of Sonoma County CA zip codes. For your research we have also included Sonoma County Area Code, Time Zone, UTC and the local County FIPS Code. Each Sonoma County California zip code has a center Longitude / Latitude point (the Sonoma County center is -122.80899810791 / 38.428398132324). For your convenience we have also indicated if that zip code in Sonoma County observes Daylight Savings time.