The answer to the crossword for the term STATE OF SOUTHERN US is ALABAMA, which is a 7-letter word. 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 is known for its diverse landscape, ranging from the Appalachian Mountains in the northeast to the Gulf Coast beaches in the south. It is also home to the nation's oldest Mardi Gras celebration, held annually in Mobile.