Below is a list of Glenarm IL zip codes. For your research we have also included Glenarm Area Code, Time Zone, UTC and the local Sangamon County FIPS Code. Each Glenarm Illinois zip code has a center Longitude / Latitude point (the Glenarm center is -89.6371 / 39.6373). For your convenience we have also indicated if that zip code in Glenarm observes Daylight Savings time. For more information on Glenarm Illinois you will find helpful business links and searches.