Mississippi is a state located in the southeastern region of the United States. Mississippi is the 32nd most extensive and 34th most populous of the 50 United States. It is bordered by Tennessee to the north, Alabama to the east, the Gulf of Mexico and Louisiana to the south, and Arkansas and Louisiana to the west. The state's western boundary is largely defined by the Mississippi River. Jackson, with a population of approximately 175,000 people, is both the state's capital and largest city.