Below is a list of Marengo IL zip codes. For your research we have also included Marengo Area Code, Time Zone, UTC and the local Mchenry County FIPS Code. Each Marengo Illinois zip code has a center Longitude / Latitude point (the Marengo center is -88.600898742676 / 42.245800018311). For your convenience we have also indicated if that zip code in Marengo observes Daylight Savings time.