Below is a list of Grand Mound IA zip codes. For your research we have also included Grand Mound Area Code, Time Zone, UTC and the local Clinton County FIPS Code. Each Grand Mound Iowa zip code has a center Longitude / Latitude point (the Grand Mound center is -90.645896911621 / 41.823001861572). For your convenience we have also indicated if that zip code in Grand Mound observes Daylight Savings time.