Below is a list of Humeston IA zip codes. For your research we have also included Humeston Area Code, Time Zone, UTC and the local Wayne County FIPS Code. Each Humeston Iowa zip code has a center Longitude / Latitude point (the Humeston center is -93.499496459961 / 40.86009979248). For your convenience we have also indicated if that zip code in Humeston observes Daylight Savings time.