Below is a list of Harding County SD zip codes. For your research we have also included Harding County Area Code, Time Zone, UTC and the local County FIPS Code. Each Harding County South Dakota zip code has a center Longitude / Latitude point (the Harding County center is -103.43299865723 / 45.602699279785). For your convenience we have also indicated if that zip code in Harding County observes Daylight Savings time.