Below is a list of Grundy Center IA zip codes. For your research we have also included Grundy Center Area Code, Time Zone, UTC and the local Grundy County FIPS Code. Each Grundy Center Iowa zip code has a center Longitude / Latitude point (the Grundy Center center is -92.774002075195 / 42.361499786377). For your convenience we have also indicated if that zip code in Grundy Center observes Daylight Savings time.