Leslie county is in the Eastern Coal Field region of Kentucky. The elevation in the county ranges from 757 to 2600 feet above sea level.
In 2010 the county population was 11,310 in a land area of 400.84 square miles, an average of 28.2 people per square mile.
The equine population was not available in the 2012 Kentucky Equine Survey.
Leslie county was named for Governor Preston H. Leslie.
Most of the county is within the Daniel Boone National Forest.