Hailakandi was one of the oldest subdivision is the state of Assam. It was constituted as a civil subdivision on 1st June 1869. Subsequently, it was upgraded to district in 1989. It has an area of 1326.10 square kilometers. Out of this, more than 50% is reserve forest. There are two reserve forests in Hailakandi district viz. Inner line reserve forest and Katakhal reserve forest. The district has got inter-state border with Mizoram on its south having a length of 76 kilometers besides inter district border on other sides with Karimganj and Cachar districts.