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Tennessee is a state located in the Southeastern United States. It has a population of 6,214,888, an increase of nearly 9.5% since 2000. Tennessee is the 14th fastest growing state in the nation and is ranked 17th by population.It is ranked 36th by total land area. In 1796, it became the 16th state to join the Union. The capital and second largest city is Nashville, with a 2008 population of 626,144. The Nashville Metropolitan Area is the state's largest, at 1,521,437 people. Tennessee's largest city is Memphis, with a 2008 population of 670,902 and 1,280,533 in its metro area.

Tennessee borders eight other states: Kentucky and Virginia to the north;North Carolina to the east; Georgia, Alabama and Mississippi on the south;Arkansas and Missouri on the Mississippi River to the west. Tennessee ties Missouri as the state bordering the most other states. The state is trisected by the Tennessee River. The highest point in the state is Clingmans Dome at 6,643 feet (2,025 m).Clingmans Dome, which lies on Tennessee's eastern border, is the highest point on the Appalachian Trail. The state line between Tennessee and North Carolina crosses the summit. The lowest point is the Mississippi River at the Mississippi state line. The geographical center of the state is located in Murfreesboro.

The state of Tennessee is geographically and constitutionally divided into three Grand Divisions: East Tennessee, Middle Tennessee, and West Tennessee. Tennessee features six principal physiographic regions: the Blue Ridge, the Appalachian Ridge and Valley Region, the Cumberland Plateau, the Highland Rim, the Nashville Basin, and the Gulf Coastal Plain. Tennessee is home to the most caves in the United States, with over 8,350 caves registered to date.