Barlekha (Bengali: বড়লেখা, romanized: Bôrlekha) is an upazila (sub-district) of Moulvibazar District, located in Sylhet Division, Bangladesh.

[4] The Malegarh hillock at Lathu (came to be known later as Shahbajpur), the northern tip of Barlekha Upazila, was shaken up in November 1857 after Indian rebels revolted in Meerut.

[5] The soldiers of 34 Native Infantry in Chittagong revolted, looted the armoury and treasury and set army barracks on fire.

A force of 160 company soldiers under Major Byng, initially reached Protaphgarh (now in India) and then Malegarh on December 19, 1857.

Barlekha had a literacy rate (age 7 and over) of 52.42%, compared to the national average of 51.8%, and a sex ratio of 1071 females per 1000 males.

Deposit of radioactive uranium has been discovered in Haragachha Hill at Juri, and an expert team has authenticated its reserve.

Local Hindus believe the circular pool where the water falls is a magical place, and many worshippers go there every year.

A 16th century mosque located in Loghati, Dasher Bazar is an archaeological heritage site that continues to attract visitors.

Over 40% of Hakaluki Haor, one of the largest marsh wetlands of Bangladesh as well as of Asia covering a total surface area of 181.15 km2 falls within Barlekha.

[17] Every winter, tens of thousands of guest birds of about 150 species from Siberia and other cold regions flock to the haors.

They include Bright and Rose King-duck, Pati-duck, Bali Hash, Lenja, Chity, Sorali, Boikal, Nilshir Piyan, Pantamukhi, Pankouri, Buti-duck, China, Rangamuri, Black-duck, Peributhi, Chokachoki, Giria, Khonjona, Patari, Dolpipi, Water-hen, North-Giria, Dahuk, Patibatan, Common-chill, Cotton-Chill, Gergini, Cottontail, Pintail, Toughed Duck.

Hakaluki Haor presents a unique type of ecosystem as well as a new set of management issues.

Hakaluki Haor is on a global level a very important wetland for a wide variety of waterfowl, particularly Anatidae ducks.

In Hakaluki Haor threatened species such as Pallas’ Fish Eagle also occurs at the wetland, which is furthermore an important area for reptiles such as freshwater turtles, and for amphibians.

[18][19][20] Barlekha Upazila is divided into Barlekha Municipality and ten union parishads: Baralekha, Borni, Dakshin Dakshinbhag, Dakshin Shahbazpur, Dasherbazar, Nizbahadurpur, Sujanagar, Talimpur, Uttar Dakshinbhag, and Uttar Shahbazpur.