Below is a list of New Hartford IA zip codes. For your research we have also included New Hartford Area Code, Time Zone, UTC and the local Butler County FIPS Code. Each New Hartford Iowa zip code has a center Longitude / Latitude point (the New Hartford center is -92.622100830078 / 42.566799163818). For your convenience we have also indicated if that zip code in New Hartford observes Daylight Savings time.