Below is a list of Saint Johns County FL zip codes. For your research we have also included Saint Johns County Area Code, Time Zone, UTC and the local County FIPS Code. Each Saint Johns County Florida zip code has a center Longitude / Latitude point (the Saint Johns County center is -81.426300048828 / 29.96669960022). For your convenience we have also indicated if that zip code in Saint Johns County observes Daylight Savings time.