Below is a list of Cascade IA zip codes. For your research we have also included Cascade Area Code, Time Zone, UTC and the local Dubuque County FIPS Code. Each Cascade Iowa zip code has a center Longitude / Latitude point (the Cascade center is -91.00959777832 / 42.300498962402). For your convenience we have also indicated if that zip code in Cascade observes Daylight Savings time.