Martin county is in the Eastern Coal Field region of Kentucky. The elevation in the county ranges from 550 to 1606 feet above sea level.
In 2010 the county population was 12,929 in a land area of 229.61 square miles, an average of 56.3 people per square mile.
The equine population was not available in the 2012 Kentucky Equine Survey.
Martin county was named to honor John Preston Martin, who served in the Kentucky house and senate and in the United States Senate.