Below is a list of Greenfield IA zip codes. For your research we have also included Greenfield Area Code, Time Zone, UTC and the local Adair County FIPS Code. Each Greenfield Iowa zip code has a center Longitude / Latitude point (the Greenfield center is -94.4602 / 41.3057). For your convenience we have also indicated if that zip code in Greenfield observes Daylight Savings time. For more information on Greenfield Iowa you will find helpful business links and searches.