Below is a list of Wilmington IL zip codes. For your research we have also included Wilmington Area Code, Time Zone, UTC and the local Will County FIPS Code. Each Wilmington Illinois zip code has a center Longitude / Latitude point (the Wilmington center is -88.146797180176 / 41.307899475098). For your convenience we have also indicated if that zip code in Wilmington observes Daylight Savings time.