List of districts of Arunachal Pradesh
On December 1, 1965 the erstwhile North-East Frontier Agency was divided into five districts:
- On May 13, 1980, Subansiri district was bifurcated into two districts: Lower Subansiri district and Upper Subansiri district. Upper Subansiri district comprised the area occupied by the erstwhile Daporijo sub-division and Lower Subansiri district comprised the rest of the area occupied by the erstwhile Subansiri district.
- On June 1, 1980, the erstwhile Lohit district was divided into two districts: Lohit district and Dibang Valley district. On the same day, Siang district was bifurcated into two districts: East Siang district and West Siang district. And Sepla and Bomdila sub-divisions of the Kameng district were transformed into East Kameng district and West Kameng district, respectively.
- On October 6, 1984, Tawang district was separated from East Kameng district.
- In 1987, the ersthwile Tirap district was divided into two districts: Tirap district and Changlang district.
- On September 22, 1992, the erstwhile Lower Subansiri district was again bufurcated into Lower Subansiri district and Papum Pare district.
- In 1999, Upper Siang district was split from East Siang district.
- In June 2000, Kurung Kumey district was carved out from the erstwhile Lower Subansiri district.
- On December 16, 2001, Dibang Valley district was bifurcated into Upper Dibang Valley district and Lower Dibang Valley district.
- On February 16, 2004, Anjaw district was carved out from the erstwhile Lohit district.
- On March 19, 2012, Longding district was carved out from the erstwhile Tirap district.
- On November 17, 2014, Namsai district was carved out from the erstwhile Lohit district.
- On February 8, 2015, Kra Daadi district was carved out from the erstwhile Kurung Kumey district.
- On November 27, 2015, a new Siang district was carved out from parts of East Siang and West Siang districts.
The districts of Arunachal Pradesh state are administrative geographical units, each headed by a deputy commissioner, an officer belonging to the Indian Administrative Service.
|Code||District||Headquarters||Population (2011)||Area (km²)||Density (/km²)||Map|
|UD||Lower Dibang Valley||Roing||53,986||3,900||14|
|Upper Dibang Valley||Anini||7,948||9,129||1|