Below is a list of Saint Louis City County MO zip codes. For your research we have also included Saint Louis City County Area Code, Time Zone, UTC and the local County FIPS Code. Each Saint Louis City County Missouri zip code has a center Longitude / Latitude point (the Saint Louis City County center is -90.231903076172 / 38.629901885986). For your convenience we have also indicated if that zip code in Saint Louis City County observes Daylight Savings time.