Below is a list of Dumont IA zip codes. For your research we have also included Dumont Area Code, Time Zone, UTC and the local Butler County FIPS Code. Each Dumont Iowa zip code has a center Longitude / Latitude point (the Dumont center is -92.975601196289 / 42.751998901367). For your convenience we have also indicated if that zip code in Dumont observes Daylight Savings time.