Corbin is a home rule-class city in Whitley, Knox and Laurel counties in the southeastern portion of the U.S. state of Kentucky. As of the 2020 ce…Corbin is a home rule-class city in Whitley, Knox and Laurel counties in the southeastern portion of the U.S. state of Kentucky. As of the 2020 census, the city population was 7,856. Corbin is on Interstate 75 and US Route 25W, about halfway between Knoxville, Tennessee, and Lexington, Kentucky.