Below is a list of Gridley IL zip codes. For your research we have also included Gridley Area Code, Time Zone, UTC and the local Mclean County FIPS Code. Each Gridley Illinois zip code has a center Longitude / Latitude point (the Gridley center is -88.881301879883 / 40.744499206543). For your convenience we have also indicated if that zip code in Gridley observes Daylight Savings time.