Below is a list of Gustine CA zip codes. For your research we have also included Gustine Area Code, Time Zone, UTC and the local Merced County FIPS Code. Each Gustine California zip code has a center Longitude / Latitude point (the Gustine center is -121.00299835205 / 37.252998352051). For your convenience we have also indicated if that zip code in Gustine observes Daylight Savings time.