Below is a list of Lyndon IL zip codes. For your research we have also included Lyndon Area Code, Time Zone, UTC and the local Whiteside County FIPS Code. Each Lyndon Illinois zip code has a center Longitude / Latitude point (the Lyndon center is -89.926002502441 / 41.717498779297). For your convenience we have also indicated if that zip code in Lyndon observes Daylight Savings time.