Below is a list of Irwin IA zip codes. For your research we have also included Irwin Area Code, Time Zone, UTC and the local Shelby County FIPS Code. Each Irwin Iowa zip code has a center Longitude / Latitude point (the Irwin center is -95.206100463867 / 41.791801452637). For your convenience we have also indicated if that zip code in Irwin observes Daylight Savings time.