The South | Definition, States, & History | Britannica
https://www.britannica.com/place/the-South-region
the South, region, southeastern United States, generally though not exclusively considered to be south of the Mason and Dixon Line, the Ohio River, and the 36°30′ parallel. As defined by the U.S. federal government, it includes Alabama, Arkansas, Delaware, the District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, South Carolina ...