The South Atlantic United States form one of the nine Census Bureau Divisions within the United States that are recognized by the United States Census Bureau.

This division includes eight states and one district; Delaware, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, West Virginia, and the District of Columbia http://www.census.gov/geo/www/us_regdiv.pdf. Together with the East South Central States (Alabama, Kentucky, Mississippi and Tennessee) and the West South Central States (Arkansas, Louisiana, Oklahoma and Texas), the South Atlantic States constitute the United States Census Bureau's broader Census Bureau Region of the South (the other three regions being the Northeast, Midwest and West, all of which have two divisions).

Most of the area covered by the South Atlantic United States comprises the New South, one of the nine "moral regions" into which the United States is divided in the 1991 non-fiction book The Day America Told The Truth, with the rest of the South being placed in a different moral region, that of Old Dixie. Some parts of Virginia, West Virginia, and Maryland, along with the District of Columbia, are considered to be a part of Metropolis, with the northern panhandle of West Virginia being classified in the Rust Belt.

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