Below is a list of Chillicothe IL zip codes. For your research we have also included Chillicothe Area Code, Time Zone, UTC and the local Peoria County FIPS Code. Each Chillicothe Illinois zip code has a center Longitude / Latitude point (the Chillicothe center is -89.500801086426 / 40.922199249268). For your convenience we have also indicated if that zip code in Chillicothe observes Daylight Savings time.