marsh wetland ecological system of Eastern Bangladesh in an area bordering Assam, India. It is one of Bangladesh's largest and one of Asia's larger marsh wetland resources. Some 190,000 people live in the surrounding Hakaluki haor area.
Hakaluki Haor was designated an Ecologically Critical Area (ECA). It also is a protected Ramsar site of international importance for the conservation and sustainable utilization of wetlands.
The surface area of Hakaluki Haor is 181.15 km2, of which 72.46 km2 (40.01%) is within the territory of Barlekha Upazila. The haor is partly under the jurisdiction of Barlekha Upazila