Pickett County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 5,001, making it the least populous county in Tennessee. Its county seat is Byrdstown. The city of Byrdstown and the Kentucky town of Albany, 11 miles to the northeast, are positioned between two Army Corps of Engineers lakes: Dale Hollow Lake, mainly in Tennessee, and Lake Cumberland, in Kentucky.