Below is a list of Alpena SD zip codes. For your research we have also included Alpena Area Code, Time Zone, UTC and the local Jerauld County FIPS Code. Each Alpena South Dakota zip code has a center Longitude / Latitude point (the Alpena center is -98.36840057373 / 44.182399749756). For your convenience we have also indicated if that zip code in Alpena observes Daylight Savings time.