| Districts
| S.No |
Districts |
Area in Sq Km |
Population |
Headquarters |
| 1. |
Tawang |
2,172 |
38,924 |
Tawang |
| 2. |
West Kameng |
7,422 |
74,599 |
Bomdila |
| 3. |
East Kameng |
4,134 |
57,179 |
Seppa |
| 4. |
Papum-Pare |
2,875 |
122,003 |
Itanagar (Yupia) |
| 5. |
Lower Subansiri |
10,135 |
98,244 |
Ziro |
| 6. |
Upper Subansiri |
7,032 |
55,346 |
Daporijo |
| 7. |
West Siang |
8,325 |
103,918 |
Along |
| 8. |
East Siang |
4,005 |
87,397 |
Pasighat |
| 9. |
Upper Siang |
6,188 |
33,363 |
Yingkiong |
| 10. |
Upper Dibang Valley |
13,029 |
57,720 |
Anini |
| 11. |
Lower Dibang Valley |
3, 900 |
50,448 |
Roing |
| 12. |
Lohit |
11,402 |
143,527 |
Tezu |
| 13. |
Changlang |
4,662 |
125,422 |
Changlang |
| 14. |
Tirap |
2, 362 |
100,326 |
Khonsa |
| 15 |
Kurung-Kumey |
4005 |
87430 |
Layying-Yangte |
| 16 |
Anjaw |
6190 |
21089 |
Anjaw |
| 17 |
Longding |
- |
- |
Longding |
|
