Below is a list of Iroquois SD zip codes. For your research we have also included Iroquois Area Code, Time Zone, UTC and the local Kingsbury County FIPS Code. Each Iroquois South Dakota zip code has a center Longitude / Latitude point (the Iroquois center is -97.847099304199 / 44.369300842285). For your convenience we have also indicated if that zip code in Iroquois observes Daylight Savings time.