Below is a list of Frankfort IL zip codes. For your research we have also included Frankfort Area Code, Time Zone, UTC and the local Will County FIPS Code. Each Frankfort Illinois zip code has a center Longitude / Latitude point (the Frankfort center is -87.841499328613 / 41.494400024414). For your convenience we have also indicated if that zip code in Frankfort observes Daylight Savings time.