Trigg county was formed in 1820. It is located in the Pennyrile region of the state. The elevation in the county ranges from 359 to 813 feet above sea level. In 2000 the county population was 12,597 in a land area of 443.12 square miles, an average of 28.4 people per square mile. The county seat is Cadiz. Much of Trigg county lies within the Land Between the Lakes.