Below is a list of Grand Junction IA zip codes. For your research we have also included Grand Junction Area Code, Time Zone, UTC and the local Greene County FIPS Code. Each Grand Junction Iowa zip code has a center Longitude / Latitude point (the Grand Junction center is -94.2333 / 42.0317). For your convenience we have also indicated if that zip code in Grand Junction observes Daylight Savings time. For more information on Grand Junction Iowa you will find helpful business links and searches.