Below is a list of Mazon IL zip codes. For your research we have also included Mazon Area Code, Time Zone, UTC and the local Grundy County FIPS Code. Each Mazon Illinois zip code has a center Longitude / Latitude point (the Mazon center is -88.418899536133 / 41.241199493408). For your convenience we have also indicated if that zip code in Mazon observes Daylight Savings time.