Below is a list of Chestnut IL zip codes. For your research we have also included Chestnut Area Code, Time Zone, UTC and the local Logan County FIPS Code. Each Chestnut Illinois zip code has a center Longitude / Latitude point (the Chestnut center is -89.183700561523 / 40.052299499512). For your convenience we have also indicated if that zip code in Chestnut observes Daylight Savings time.