Below is a list of La Mesa CA zip codes. For your research we have also included La Mesa Area Code, Time Zone, UTC and the local San Diego County FIPS Code. Each La Mesa California zip code has a center Longitude / Latitude point (the La Mesa center is -117.02300262451 / 32.770099639893). For your convenience we have also indicated if that zip code in La Mesa observes Daylight Savings time.