Below is a list of Knoxville IL zip codes. For your research we have also included Knoxville Area Code, Time Zone, UTC and the local Knox County FIPS Code. Each Knoxville Illinois zip code has a center Longitude / Latitude point (the Knoxville center is -90.28929901123 / 40.908199310303). For your convenience we have also indicated if that zip code in Knoxville observes Daylight Savings time.