Below is a list of Mclean County IL zip codes. For your research we have also included Mclean County Area Code, Time Zone, UTC and the local County FIPS Code. Each Mclean County Illinois zip code has a center Longitude / Latitude point (the Mclean County center is -88.876403808594 / 40.497100830078). For your convenience we have also indicated if that zip code in Mclean County observes Daylight Savings time.