Below is a list of Whitehorse SD zip codes. For your research we have also included Whitehorse Area Code, Time Zone, UTC and the local Dewey County FIPS Code. Each Whitehorse South Dakota zip code has a center Longitude / Latitude point (the Whitehorse center is -100.8870010376 / 45.270599365234). For your convenience we have also indicated if that zip code in Whitehorse observes Daylight Savings time.