Below is a list of Plymouth IA zip codes. For your research we have also included Plymouth Area Code, Time Zone, UTC and the local Cerro Gordo County FIPS Code. Each Plymouth Iowa zip code has a center Longitude / Latitude point (the Plymouth center is -93.12329864502 / 43.242500305176). For your convenience we have also indicated if that zip code in Plymouth observes Daylight Savings time.