Below is a list of Hazleton IA zip codes. For your research we have also included Hazleton Area Code, Time Zone, UTC and the local Buchanan County FIPS Code. Each Hazleton Iowa zip code has a center Longitude / Latitude point (the Hazleton center is -91.905601501465 / 42.617500305176). For your convenience we have also indicated if that zip code in Hazleton observes Daylight Savings time.