Below is a list of Clarendon Hills IL zip codes. For your research we have also included Clarendon Hills Area Code, Time Zone, UTC and the local Dupage County FIPS Code. Each Clarendon Hills Illinois zip code has a center Longitude / Latitude point (the Clarendon Hills center is -87.957000732422 / 41.803100585938). For your convenience we have also indicated if that zip code in Clarendon Hills observes Daylight Savings time.