Below is a list of San Diego County CA zip codes. For your research we have also included San Diego County Area Code, Time Zone, UTC and the local County FIPS Code. Each San Diego County California zip code has a center Longitude / Latitude point (the San Diego County center is -117.07199859619 / 32.86780166626). For your convenience we have also indicated if that zip code in San Diego County observes Daylight Savings time.