Below is a list of Deerfield IL zip codes. For your research we have also included Deerfield Area Code, Time Zone, UTC and the local Lake County FIPS Code. Each Deerfield Illinois zip code has a center Longitude / Latitude point (the Deerfield center is -87.844398498535 / 42.167301177979). For your convenience we have also indicated if that zip code in Deerfield observes Daylight Savings time.