Below is a list of Waterloo IA zip codes. For your research we have also included Waterloo Area Code, Time Zone, UTC and the local Black Hawk County FIPS Code. Each Waterloo Iowa zip code has a center Longitude / Latitude point (the Waterloo center is -92.3671 / 42.4762). For your convenience we have also indicated if that zip code in Waterloo observes Daylight Savings time. For more information on Waterloo Iowa you will find helpful business links and searches.