McLean county is in the Western Coal Field region of Kentucky. The elevation in the county ranges from 345 to 660 feet above sea level.
In 2010 the county population was 9,531 in a land area of 252.47 square miles, an average of 37.8 people per square mile.
The equine population was 400 in the 2012 Kentucky Equine Survey.
McLean county was named to honor Alney McLean, congressman and veteran of the War of 1812.