Below is a list of Mattoon IL zip codes. For your research we have also included Mattoon Area Code, Time Zone, UTC and the local Coles County FIPS Code. Each Mattoon Illinois zip code has a center Longitude / Latitude point (the Mattoon center is -88.376502990723 / 39.481601715088). For your convenience we have also indicated if that zip code in Mattoon observes Daylight Savings time.