Below is a list of Granite City IL zip codes. For your research we have also included Granite City Area Code, Time Zone, UTC and the local Madison County FIPS Code. Each Granite City Illinois zip code has a center Longitude / Latitude point (the Granite City center is -90.127700805664 / 38.714500427246). For your convenience we have also indicated if that zip code in Granite City observes Daylight Savings time.