Below is a list of Norwalk IA zip codes. For your research we have also included Norwalk Area Code, Time Zone, UTC and the local Warren County FIPS Code. Each Norwalk Iowa zip code has a center Longitude / Latitude point (the Norwalk center is -93.674201965332 / 41.504901885986). For your convenience we have also indicated if that zip code in Norwalk observes Daylight Savings time.