Below is a list of Peoria County IL zip codes. For your research we have also included Peoria County Area Code, Time Zone, UTC and the local County FIPS Code. Each Peoria County Illinois zip code has a center Longitude / Latitude point (the Peoria County center is -89.64769744873 / 40.731800079346). For your convenience we have also indicated if that zip code in Peoria County observes Daylight Savings time.