Historically, during the Second World War, the Changlang district was located on the Ledo Road. It never became the part of Britian colonialism. The peoples from the region used Silk Road for tea trading. Presently, Naga militants are raising their head here. Changlang District is full of beautiful hills lies in the southeastern part of the Arunachal Pradesh state. Legends believe that the name “Changlang” was taken from the local word “Changlangkan”, a hilltop where some people discovered a poisonous herb which is generally used for poisoning fish in the river. The district of Changlang has reached the present stage by covering a gradual development process of administration. Before 14th November 1987, it was a part of the Tirap district. Under the Arunachal Pradesh Reorganization of Districts Amendment Bill 1987, the Government of Arunachal Pradesh officially announced this region as a separate district on 14th November, 1987 and then became the 10th district of the Indian state, Arunachal Pradesh.

Wangnia Pongte was an Indian football player and later became politician. He represented Changlang North assembly constituency in the Legislative assembly in the year 1990. He was also appointed as Mos (Independent charge) for Research, Library, Labour and Agriculture. He also served as the Chairman of the state Mineral Development Trading Corporation.

Geographically, the district has a total 4,662 sq. km. area and occupies the rank 12th in State and 246th in India on the bases of this size. It lies at 27°13'N latitude, 95°73'E longitude and 580 m altitude. In the year 2021, there was a total 85.39% forest area of total geographical area. The main river that flows through the district is Dihing River. The Changlang district is enclosed by Tinsukia district of Assam, Lohit district, Anjaw district, Tirap district and Myanmar. The actual rainfall in the district was 1376.2 mm in the year of 2021-22.

Administratively, the district is divided into 3 towns and 362 villages. English is its administrative language. The district came in to existence on 14th November, 1987. It has administrative headquarters located at Changlang town which is situated at the distance of 348 km. from the State Capital. There are total 5 Arunachal Pradesh Legislative Assembly constituencies in the district namely Bordumsa, Miao, Nampong, Changlang South and Changlang North. All of these are the part of Arunachal East Lok Sabha constituency. The Changlang district has 5 sub-divisions such as Changlang, Manmao, Jairampur, Bordumsa and Miao.

Demographically, according to the 2011 census, the district has a total number of 28,428 households with a total of 1,48,226 comprising 76,948 are males and 71,278 are females which leads it to rank 2nd in the state and 598th in India. The density of population of the district is 63 (persons per sq km.). The sex ratio is pegged at 926 (females per 1000 males) while the child ratio stands at 979 (females per 1000 males). As per 2011 census the percentage of major religions practiced by the people of this region is Christian, Buddhist and Hindu with 24.27%, 33.99% and 32.17% of the total population. The population growth rate during the period of 2001-2011 was 18.18% including 16.90% were males and 19.59% were females. According to 2011 census the principal languages in the district are Bengali and Tangsa with 32.16% and 20.08%. In the year 2020 the number of live births in the district was 1,947 out of which 980 were males and 967 were females. In the same year the number of deaths in the district was 174 out of which 122 were males and 52 were females.

The district is basically dependent on agricultural sector. In the year 2021-22 the gross domestic product in the district was Rs. 3,13,852 lakhs at current price and Rs. 1,87,683 lakhs at constant prices in the year 2011-2012. The net domestic product in the district during the period 2021-22 was Rs. 2,87,489 lakh at current price and Rs. 1,67,821 lakh at constant prices in the year 2011-2012. The Per Capita Income or NDDP, At Factor Cost during the period 2021-22 was Rs. 1,68,619 at current price and Rs. 98,431 at constant prices in the year 2011-2012. Fishery is the another source of income.

Tesam Pongte belongs to the Bhartiya Janta Party in Arunachal Pradesh. He is the member of the Arunachal Pradesh Legislative Assembly.

Education wise, according to the 2011 census, the district has a literacy rate of 59.8% including 68.93% are males and 49.84% are females. The total population of literate people is 73,174 comprising 44,027 are males and 29,147 are females. The total number of illiterates in the district is 75,052 out of which 32,921 are males and 42,131 are females. District Institute of Education and Training (DIET), Government Higher Secondary School, Jawlai Public School, Mahabodhi School, Jawahar Navodaya School, Kendriya Vidyalaya, St Xavier's School, Federal Institute of Science & Technology Fisat are the most reputed educational institutions in the district.

The district has a number of famous historical and religious places to visit. These places are Namdapha, World War II Cemetery, Stilwell Road, Tibetan Refugee Settlement Camp, Miao, Lake of No Return, Vijoynagar. Miao is a small town, located on the banks of Noa-Dehing River. Patkai Bum is a hill here, a main attraction and one of the three main hills under Patkai range. Oil and tea are also famous of this place. Namdapha National Park is situated on southern and southeastern border of the Patkai hills. Namdapha National Park is reserved for Tiger since 1983. Tourists can watch the wild species here including tiger, leopard, snow leopard, and elephant and Himalayan black bear. The lake of no return was used for aircraft landing during the World War II. World War II Cemetery is also known as Jairampur Cemetery. The soldiers of world war II from India, China, America and Britain were buried here. Stilwell Road was constructed by Americans during the World War II. Ledo Road was renamed Stilwell Road. Nampong is famous as Hell Pass and Hell Gate.