Below is a list of Oelwein IA zip codes. For your research we have also included Oelwein Area Code, Time Zone, UTC and the local Fayette County FIPS Code. Each Oelwein Iowa zip code has a center Longitude / Latitude point (the Oelwein center is -91.912002563477 / 42.67850112915). For your convenience we have also indicated if that zip code in Oelwein observes Daylight Savings time.