Below is a list of Massac County IL zip codes. For your research we have also included Massac County Area Code, Time Zone, UTC and the local County FIPS Code. Each Massac County Illinois zip code has a center Longitude / Latitude point (the Massac County center is -88.732002258301 / 37.162700653076). For your convenience we have also indicated if that zip code in Massac County observes Daylight Savings time.