Below is a list of El Cajon CA zip codes. For your research we have also included El Cajon Area Code, Time Zone, UTC and the local San Diego County FIPS Code. Each El Cajon California zip code has a center Longitude / Latitude point (the El Cajon center is -116.96199798584 / 32.794998168945). For your convenience we have also indicated if that zip code in El Cajon observes Daylight Savings time.