Below is a list of Hillsboro IL zip codes. For your research we have also included Hillsboro Area Code, Time Zone, UTC and the local Montgomery County FIPS Code. Each Hillsboro Illinois zip code has a center Longitude / Latitude point (the Hillsboro center is -89.481597900391 / 39.193099975586). For your convenience we have also indicated if that zip code in Hillsboro observes Daylight Savings time.