Grant county is in the Outer Bluegrass region of Kentucky. The elevation in the county ranges from 530 to 1000 feet above sea level.
In 2010 the county population was 24,662 in a land area of 257.97 square miles, an average of 95.6 people per square mile.
The equine population was 2,700 in the 2012 Kentucky Equine Survey.
Grant county was probably named for a member of the Grant family, early settlers in the area.