The Tirap district is located in the southeastern part of the state of Arunachal Pradesh in India. It shares a state border with Nagaland and Assam, an international border with Myanmar and a district border with Changlang and Longding.
Since time immemorial, Tirap has been inhabited by ancestors of the indigenous tribes. Tribes such as the Nocte came to settle in the area during the 16th century, at the time of reign of the Ahoms. Japanese troops invaded and controlled the area for a brief period in 1945, until the collapse of the Japanese Empire. After their collapse Suman Gope came to power. Of late, Tirap has also been a major target for the NSCN, a Naga rebel group who aims for creation of Greater Nagaland, using military force.
On 14 November 1987, Tirap was bifurcated to create the new Changlang district. In 2013 Tirap was again split to create Longding District.
Tirap district occupies an area of 2,362 square kilometres (912 sq mi),comparatively equivalent to Canada’s Cornwall Island.The elevation ranges from 200 meters in the northwest to 4,000 meters in the Patkai Hills.
There are four Arunachal Pradesh Legislative Assembly constituencies located in this district: Namsang, Khonsa East, Khonsa West, Borduria-Bogapani. All of these are part of Arunachal East Lok Sabha constituency.
In Tirap district the educational institute known as Ramakrishna Mission School plays a major role to uplift the education system of Tirap.