Iraq - Al-Hammar Marshes (Lagoon) - Unesco The Ahwar of Southern Iraq: Refuge of Biodiversity and the Relict Landscape of the Mesopotamian Cities

The Hammar Marshes (Arabic: هور الحمار‎) are a large wetland complex in southeastern Iraq that are part of the Mesopotamian Marshes in the Tigris–Euphrates river system. 

The Hammar Marshes are located in the Dhi Qar and Basra Governorates. They ared are bordered in the north by the city of Al-Qurnah, in the northeast by the Euphrates River, in the southeast by the city of Basra, in the south by saline lakes and the Arabian Desert, in the west and northwest by the urban centres of Nasiriyah and Al-Chibayish. Its main water sources are the Euphrates and its tributaries. Additional water from the Tigris reached the wetland through overflow from the Central Marshes. 

The shallow eutrophic and slightly brackish Lake Hammar is the largest water body in the Hammar Marshes.

The main ethnic group in the area is the Marsh Arabs.