Below is a list of Hamlin IA zip codes. For your research we have also included Hamlin Area Code, Time Zone, UTC and the local Audubon County FIPS Code. Each Hamlin Iowa zip code has a center Longitude / Latitude point (the Hamlin center is -94.905197143555 / 41.666801452637). For your convenience we have also indicated if that zip code in Hamlin observes Daylight Savings time.