What is Southeastern United States?

The southeastern United States, also referred to as the American Southeast or simply the Southeast, is broadly the eastern portion of the southern United States and the southern portion of the eastern United States. It comprises at least a core of states on the lower East Coast of the United States and eastern Gulf Coast. Expansively, it includes everything south of the Mason–Dixon line and Ohio River, stretching as far west as Arkansas and Louisiana, and as far north as West Virginia and Maryland. There is no official U.S. government definition of the region, though various agencies and departments use different definitions.