Below is a list of Harristown IL zip codes. For your research we have also included Harristown Area Code, Time Zone, UTC and the local Macon County FIPS Code. Each Harristown Illinois zip code has a center Longitude / Latitude point (the Harristown center is -89.057403564453 / 39.846000671387). For your convenience we have also indicated if that zip code in Harristown observes Daylight Savings time.