Sunamganj (সুনামগঞ্জ Sunamgonj) is a town and district located in north-eastern Bangladesh within the Sylhet Division.
The district has the most Beautiful Lake of Bangladesh known as Tanguar Hawor.
In very winter the haor is home to about 200 types of migratory birds. The haor is an important source of fish. In 1999–2000, the government earned 7,073,184 takas as revenue just from fisheries of the haor. There are more than 140 species of fresh water fish in the haor. The more predominant among them are: ayir, gang magur, baim, tara, gutum, gulsha, tengra, titna, garia, beti, kakia etc.