United States Southeastern United States http://purl.bioontology.org/ontology/MESH/D015144 http://purl.obolibrary.org/obo/NCIT_C43448 The area in the United States comprised of the following states: Tennessee, Georgia, Florida, Alabama and Mississippi. The geographic area of the southeastern region of the United States in general or when the specific state or states are not included. The states usually included in this region are Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, West Virginia, and Virginia.