Below is a list of Knoxville IA zip codes. For your research we have also included Knoxville Area Code, Time Zone, UTC and the local Marion County FIPS Code. Each Knoxville Iowa zip code has a center Longitude / Latitude point (the Knoxville center is -93.099899291992 / 41.319000244141). For your convenience we have also indicated if that zip code in Knoxville observes Daylight Savings time.