The Barak Valley is the southernmost region and administrative division of the Indian state of Assam. It is named after the Barak river. The Barak valley consists of three administrative districts of Assam namely - Cachar, Karimganj, and Hailakandi. The main and largest city is Silchar, which seats the headquarter of Cachar district and also serves as administrative divisional office of Barak valley division. The valley is bordered by Mizoram and Tripura to the south, Bangladesh and Meghalaya to the west and Manipur to the east respectively. Once North Cachar Hills was a part of Cachar district which became a subdivision in 1951 and eventually a separate district. On 1 July 1983, Karimganj district was curved out from the eponymous subdivision of Cachar district. In 1989 the subdivision of Hailakandi was upgraded into Hailakandi district.

Assam is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of 78,438 km2 (30,285 sq mi). It is the second largest state in northeastern India by area and the largest in terms of population. The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur to the east; Meghalaya, Tripura, Mizoram and Bangladesh to the south; and West Bengal to the west via the Siliguri Corridor, a 22-kilometre-wide (14 mi) strip of land that connects the state to the rest of India. Assamese and Boro are the official languages of Assam. Meitei (Manipuri) is the official language of Hojai district and the entirety of the Barak Valley districts, while Bengali is an official language in the three districts of Barak Valley.