Nicholas county is in the Bluegrass region of Kentucky. The elevation in the county ranges from 565 to 1060 feet above sea level.
In 2010 the county population was 7,135 in a land area of 195.17 square miles, an average of 36.6 people per square mile.
Nicholas was named for George Nicholas, who served in the American Revolution, as Kentucky's attorney general, and the first law professor at Transylvania College. The original county seat was at Blue Licks. It moved to Ellisville in 1805 and finally to Carlisle in 1816.