Lower Mesopotamia[1][2] is a historical region of Mesopotamia. It is located in the alluvial plain of Iraq from the Hamrin Mountains to the Faw Peninsula near the Persian Gulf.
In the Middle Ages it was also known as the Sawad and al-Jazira al-sflia ("Lower Jazira"), which strictly speaking designated only the southern alluvial plain,[3] and Arab Iraq, as opposed to Persian Iraq, the Jibal.[4] Lower Mesopotamia was home to Sumer and Babylonia.[5]