The Territory of Mississippi was an organized incorporated territory of the United States that existed from April 7, 1798, until December 10, 1817, when the final extent of the territory was admitted to the Union

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 as the state of Mississippi

History of Mississippi

The state of Mississippi's history goes back beyond American statehood to ancient Native American times.-Native Americans:At the end of the last Ice Age Native American or Paleo-Indians appeared in what today is the South. Paleo Indians in the South were hunter-gatherers who pursued the mega fauna...

.

The Mississippi Territory was expanded in 1804 and again in 1812 until it extended from the Gulf of Mexico

Gulf of Mexico

The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...

 to the southern border 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...

. (Georgia gave up the northern portion in 1802, and the Gulf Coast region was acquired from Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

.) Originally Mississippi Territory included what is now Alabama

Alabama

Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...

, and 9 months before Mississippi

Mississippi

Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...

 was admitted into the Union in 1817, the Alabama Territory

Alabama Territory

The Territory of Alabama was an organized incorporated territory of the United States that existed from August 15, 1817, until December 14, 1819, when it was admitted to the Union as the State of Alabama.-History:...

 to the east was separated out on March 3.

On December 10, 1817, Mississippi

Mississippi

Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...

 was admitted to the Union as the 20th state.

The Mississippi Territory was organized in 1798 from land that had been disputed by the U.S.