Trigg county is in the Pennyrile region of Kentucky. The elevation in the county ranges from 359 to 813 feet above sea level.
In 2010 the county population was 14,339 in a land area of 441.43 square miles, an average of 32.5 people per square mile.
The equine population was 1,200 in the 2012 Kentucky Equine Survey.
Trigg county was named to honor Colonel Stephen Trigg, who died at the Battle of Blue Licks in 1782.