Susiana

Susiana (Persian: سوزیانا; [ˈsuziɒːnɒ]) was an ancient cultural and geographical region located in southwestern Iran. It broadly corresponds to the alluvial lowlands surrounding the city of Susa, forming the core area of the early Elamite civilization, which today make up most of modern Khuzestan Province.

Susiana is best understood as the Susa plain, an ecological and cultural zone influenced both by the Iranian plateau and by Mesopotamia. Archaeological surveys show continuous settlement in the region from the Neolithic period onward, especially at sites such as Chogha Bonut and Chogha Mish. Recent excavations at Tappeh Senjar have added substantial data on the development of Susiana from the Proto-Elamite to the Shimashki periods.

In the 3rd millennium BC, Susiana formed the central lowland zone of the Elamite Kingdom. During the Achaemenid Empire, Susiana was organized as a formal satrapy, and in later periods it was frequently associated with or identified as Elymais. Due to shifting borders and ambiguous terminology in historical sources, the exact relationship between Susiana, Elam, and Elymais remains debated.