Below is a list of Monroe Center IL zip codes. For your research we have also included Monroe Center Area Code, Time Zone, UTC and the local Ogle County FIPS Code. Each Monroe Center Illinois zip code has a center Longitude / Latitude point (the Monroe Center center is -89.000602722168 / 42.100898742676). For your convenience we have also indicated if that zip code in Monroe Center observes Daylight Savings time.