Below is a list of Dayton IA zip codes. For your research we have also included Dayton Area Code, Time Zone, UTC and the local Webster County FIPS Code. Each Dayton Iowa zip code has a center Longitude / Latitude point (the Dayton center is -94.068397521973 / 42.261501312256). For your convenience we have also indicated if that zip code in Dayton observes Daylight Savings time.