Below is a list of De Smet SD zip codes. For your research we have also included De Smet Area Code, Time Zone, UTC and the local Kingsbury County FIPS Code. Each De Smet South Dakota zip code has a center Longitude / Latitude point (the De Smet center is -97.551498413086 / 44.383201599121). For your convenience we have also indicated if that zip code in De Smet observes Daylight Savings time.