Below is a list of Mount Vernon SD zip codes. For your research we have also included Mount Vernon Area Code, Time Zone, UTC and the local Davison County FIPS Code. Each Mount Vernon South Dakota zip code has a center Longitude / Latitude point (the Mount Vernon center is -98.264801025391 / 43.710601806641). For your convenience we have also indicated if that zip code in Mount Vernon observes Daylight Savings time.