Huntsville's state is Alabama, which is located in the southeastern United States. It is bordered by Tennessee to the north, Georgia to the east, and Florida to the south. Alabama is known for its diverse landscape, ranging from mountains in the north to coastal plains in the south. It is also home to the nation's oldest city, Mobile, and the state capital, Montgomery. Alabama is the 24th most populous state in the US, with a population of nearly 5 million people.