Below is a list of Downers Grove IL zip codes. For your research we have also included Downers Grove Area Code, Time Zone, UTC and the local Du Page County FIPS Code. Each Downers Grove Illinois zip code has a center Longitude / Latitude point (the Downers Grove center is -88.060997009277 / 41.754199981689). For your convenience we have also indicated if that zip code in Downers Grove observes Daylight Savings time.