Below is a list of Caledonia IL zip codes. For your research we have also included Caledonia Area Code, Time Zone, UTC and the local Boone County FIPS Code. Each Caledonia Illinois zip code has a center Longitude / Latitude point (the Caledonia center is -88.890899658203 / 42.370800018311). For your convenience we have also indicated if that zip code in Caledonia observes Daylight Savings time.