Below is a list of Grafton IA zip codes. For your research we have also included Grafton Area Code, Time Zone, UTC and the local Worth County FIPS Code. Each Grafton Iowa zip code has a center Longitude / Latitude point (the Grafton center is -93.06950378418 / 43.330001831055). For your convenience we have also indicated if that zip code in Grafton observes Daylight Savings time.