Front of the Thomas J. and Caroline McClure House, located on the southern side of Grapevine Trail on the eastern edge of McClure, Illinois, United States. Built in 1882, it is listed on the National Register of Historic Places. – Nyttend, Public domain – Wikimedia Commons McClure is located in Alexander County. About 256 people live here (as of 2020). Between 2010 and 2020, the population declined from 402 to 256. The region is at 104 meters above sea level. There are about 28 streets in McClure. The postal codes are 62957. The license plate code is 618. McClure is village in McClure Precinct, Alexander County, Illinois, United States.