Below is a list of Sully County SD zip codes. For your research we have also included Sully County Area Code, Time Zone, UTC and the local County FIPS Code. Each Sully County South Dakota zip code has a center Longitude / Latitude point (the Sully County center is -100.06300354004 / 44.775501251221). For your convenience we have also indicated if that zip code in Sully County observes Daylight Savings time.