Below is a list of Quasqueton IA zip codes. For your research we have also included Quasqueton Area Code, Time Zone, UTC and the local Buchanan County FIPS Code. Each Quasqueton Iowa zip code has a center Longitude / Latitude point (the Quasqueton center is -91.761299133301 / 42.393100738525). For your convenience we have also indicated if that zip code in Quasqueton observes Daylight Savings time.