Below is a list of Ethan SD zip codes. For your research we have also included Ethan Area Code, Time Zone, UTC and the local Davison County FIPS Code. Each Ethan South Dakota zip code has a center Longitude / Latitude point (the Ethan center is -97.982902526855 / 43.5458984375). For your convenience we have also indicated if that zip code in Ethan observes Daylight Savings time.