Below is a list of Walworth County SD zip codes. For your research we have also included Walworth County Area Code, Time Zone, UTC and the local County FIPS Code. Each Walworth County South Dakota zip code has a center Longitude / Latitude point (the Walworth County center is -100.06600189209 / 45.430500030518). For your convenience we have also indicated if that zip code in Walworth County observes Daylight Savings time.