Cumberland county is in the Pennyrile region of Kentucky. The elevation in the county ranges from 510 to 1110 feet above sea level.
In 2010 the county population was 6,856 in a land area of 305.18 square miles, an average of 22.5 people per square mile.
The equine population was 700 in the 2012 Kentucky Equine Survey.
Cumberland county was named for the river, which was named for Prince William, Duke of Cumberland.