Below is a list of Merrill IA zip codes. For your research we have also included Merrill Area Code, Time Zone, UTC and the local Plymouth County FIPS Code. Each Merrill Iowa zip code has a center Longitude / Latitude point (the Merrill center is -96.246398925781 / 42.719799041748). For your convenience we have also indicated if that zip code in Merrill observes Daylight Savings time.