Below is a list of Cedarville IL zip codes. For your research we have also included Cedarville Area Code, Time Zone, UTC and the local Stephenson County FIPS Code. Each Cedarville Illinois zip code has a center Longitude / Latitude point (the Cedarville center is -89.633003234863 / 42.375900268555). For your convenience we have also indicated if that zip code in Cedarville observes Daylight Savings time.