Below is a list of Sheldon IL zip codes. For your research we have also included Sheldon Area Code, Time Zone, UTC and the local Iroquois County FIPS Code. Each Sheldon Illinois zip code has a center Longitude / Latitude point (the Sheldon center is -87.564002990723 / 40.770801544189). For your convenience we have also indicated if that zip code in Sheldon observes Daylight Savings time.