Below is a list of Promise City IA zip codes. For your research we have also included Promise City Area Code, Time Zone, UTC and the local Wayne County FIPS Code. Each Promise City Iowa zip code has a center Longitude / Latitude point (the Promise City center is -93.144996643066 / 40.74649810791). For your convenience we have also indicated if that zip code in Promise City observes Daylight Savings time.