Below is a list of Sycamore IL zip codes. For your research we have also included Sycamore Area Code, Time Zone, UTC and the local Dekalb County FIPS Code. Each Sycamore Illinois zip code has a center Longitude / Latitude point (the Sycamore center is -88.695899963379 / 41.985401153564). For your convenience we have also indicated if that zip code in Sycamore observes Daylight Savings time.