Henry county is in the Outer Bluegrass region of Kentucky. The elevation in the county ranges from 425 to 950 feet above sea level.
In 2010 the county population was 15,416 in a land area of 286.28 square miles, an average of 53.8 people per square mile.
The equine population was 2,500 in the 2012 Kentucky Equine Survey.
Henry county was named to honor Patrick Henry, who was prominent in the American Revolution and later served as governor of Virginia.