Below is a list of Poplar Grove IL zip codes. For your research we have also included Poplar Grove Area Code, Time Zone, UTC and the local Boone County FIPS Code. Each Poplar Grove Illinois zip code has a center Longitude / Latitude point (the Poplar Grove center is -88.844398498535 / 42.380199432373). For your convenience we have also indicated if that zip code in Poplar Grove observes Daylight Savings time.