Below is a list of Martinton IL zip codes. For your research we have also included Martinton Area Code, Time Zone, UTC and the local Iroquois County FIPS Code. Each Martinton Illinois zip code has a center Longitude / Latitude point (the Martinton center is -87.730598449707 / 40.915100097656). For your convenience we have also indicated if that zip code in Martinton observes Daylight Savings time.