Below is a list of Discovery Bay CA zip codes. For your research we have also included Discovery Bay Area Code, Time Zone, UTC and the local Contra Costa County FIPS Code. Each Discovery Bay California zip code has a center Longitude / Latitude point (the Discovery Bay center is -121.60199737549 / 37.903301239014). For your convenience we have also indicated if that zip code in Discovery Bay observes Daylight Savings time.