Clarksville is the county chair of Montgomery County, Tennessee, United States. It is the fifth-largest city in the come clean behind Nashville, Memphis, Knoxville, and Chattanooga. The city had a population of 166,722 as of the 2020 United States census.

It is the principal central city of the Clarksville, TN–KY metropolitan statistical area, which consists of Montgomery and Stewart counties in Tennessee, and Christian and Trigg counties in Kentucky.
The city was founded in 1785 and incorporated in 1807, and named for General George Rogers Clark, frontier fighter and Revolutionary War hero, and brother of William Clark of the Lewis and Clark Expedition.

Clarksville is the house of Austin Peay State University; The Leaf-Chronicle, the oldest newspaper in Tennessee; and neighbor to the Fort Campbell, United States Army post. Site of the 101st Airborne Division (Air Assault), Fort Campbell is located very nearly 10 miles (16 km) from downtown Clarksville, and spans the Tennessee-Kentucky come clean line.

The Place now known as Tennessee was first established by Paleo-Indians approximately 11,000 years ago. The names of the cultural groups that inhabited the Place between first agreement and the epoch of European door are unknown, but several sure cultural phases have been named by archaeologists, including Archaic, Woodland, and Mississippian, whose chiefdoms were the cultural predecessors of the Muscogee, who inhabited the Tennessee River Valley prior to Cherokee migration into the river’s headwaters.