The Jackson Purchase is a region in the state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Kentucky

Kentucky

The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...

 bounded by the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

 to the west, the Ohio River

Ohio River

The Ohio River is the largest tributary, by volume, of the Mississippi River. At the confluence, the Ohio is even bigger than the Mississippi and, thus, is hydrologically the main stream of the whole river system, including the Allegheny River further upstream...

 to the north, and Tennessee

Tennessee River

The Tennessee River is the largest tributary of the Ohio River. It is approximately 652 miles long and is located in the southeastern United States in the Tennessee Valley. The river was once popularly known as the Cherokee River, among other names...

 River to the east. Although technically part of Kentucky at its statehood in 1792, the land did not come under definitive U.S. control until 1818, when Andrew Jackson

Andrew Jackson

Andrew Jackson was the seventh President of the United States . Based in frontier Tennessee, Jackson was a politician and army general who defeated the Creek Indians at the Battle of Horseshoe Bend , and the British at the Battle of New Orleans...

 and Isaac Shelby

Isaac Shelby

Isaac Shelby was the first and fifth Governor of the U.S. state of Kentucky and served in the state legislatures of Virginia and North Carolina. He was also a soldier in Lord Dunmore's War, the Revolutionary War, and the War of 1812...

 purchased it from the Chickasaw

Chickasaw

The Chickasaw are Native American people originally from the region that would become the Southeastern United States...

 Indians. Kentuckians generally call this region the Purchase.

Jackson's purchase

Jackson Purchase (U.S. historical region)

The Jackson Purchase is a region of western Tennessee and southwestern Kentucky, bounded by the Tennessee River on the east, the Ohio River on the north, and the Mississippi River on the west, that was ceded to the United States by the Chickasaw Peoples in 1818...

 also included all of Tennessee

Tennessee

Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...

 west of the Tennessee River.