The crossword solution for the term 'South-Eastern US State' is Florida, which has seven letters. Florida is a state located in the southeastern region of the United States. It is bordered by Alabama and Georgia to the north, the Gulf of Mexico to the west, and the Atlantic Ocean to the east. It is the 22nd most populous state in the US and the 3rd most populous state in the Southeast. Florida is known for its warm climate, beaches, and diverse wildlife.