Below is a list of Defiance IA zip codes. For your research we have also included Defiance Area Code, Time Zone, UTC and the local Shelby County FIPS Code. Each Defiance Iowa zip code has a center Longitude / Latitude point (the Defiance center is -95.340202331543 / 41.826000213623). For your convenience we have also indicated if that zip code in Defiance observes Daylight Savings time.