Below is a list of Port Costa CA zip codes. For your research we have also included Port Costa Area Code, Time Zone, UTC and the local Contra Costa County FIPS Code. Each Port Costa California zip code has a center Longitude / Latitude point (the Port Costa center is -122.19100189209 / 38.045700073242). For your convenience we have also indicated if that zip code in Port Costa observes Daylight Savings time.