Geographically, the U.S. states known as the Old South are those in the Southern United States that were among the original Thirteen Colonies. The region term is differentiated from the Deep South and Upper South.
From a cultural and social standpoint, the "Old South" is used to describe the rural, agriculturally-based, slavery-reliant economy and society in the Antebellum South, prior to the American Civil War (1861–65),[2] in contrast to the "New South" of the post-Reconstruction Era.