Arunachal Pradesh geography states that the state is primarily a hilly tract nestled in the foothills of Himalayas. Previously, Arunachal Pradesh had been a part of the North Eastern Frontier Agency; but today, Arunachal Pradesh is a deemed state of the Indian Union.

A snapshot of Arunachal Pradesh geography is as follows:

Latitude - 26º28' North and 29º30' North.
Longitude - 91º30' East and 96º30' East.
Area - 83,573 square kilometers.
Capital - Itanagar.
Districts - 15.
Towns - 12.
Villages - 3862.
Boundaries - Assam, Nagaland, Bhutan, Tibet, China and Myanar.
Rivers - Brahmaputra, Kameng, Siang, Lohit, Subansiri, Tirap, etc.
Population - 1,097968 (according to 2001 census).
Literacy rate - 44.24%

Geography of Arunachal Pradesh proves that Arunachal Pradesh is a thinly populated state, posited in the foothills of the Himalayas. In Arunachal Pradesh, geography states that the region is divided into six natural regions.

The Western parts of Kameng District and Tirap District form the first two regions of the topography of Arunachal Pradesh.

The other three distinct topographical regions of the geography at Arunachal Pradesh constitute the upper, middle and the lower belts of the state; concentrated pockets of the Arunachal Pradesh foothills form the sixth region of the topography of Arunachal Pradesh.

Further, it can be said that the topography of Arunachal Pradesh is characterized by mountainous ranges and sub-mountainous terrains along the northern parts: abrasion by the mighty rivers that flows through the mountains have created broad valley, which is a major feature of the geography in Arunachal Pradesh.

Arunachal Pradesh (Land of the Dawn-Lit Mountains) is situated in the North-Eastern part of India with 83743 sq. kms area and has a long international border with Bhutan to the west (160 km), China to the north and north-east (1,080 km) and Myanmar to the east (440 km).

It stretches from snow-capped mountains in the north to the plains of Brahmaputra valley in the south. Arunachal is the largest state area-wise in the north-east region, even larger than Assam which is the most populous.

It is situated between latitude 26° 30' N and 29° 30 ' N and longitude 91° 30' E and 97° 30' E. Its main river are Siang, Kameng, Subansiri, Kamla, Siyum, Dibang, Lohit, Noa - Dihing, Kamlang, Tirap and important festivals are Mopin, Solung, Nyokum, Lossar, Si-Donyi, Boori-boot, Dree, Reh, Sipong Yong, Chalo-loku, Kshyatsowai, Tamladu, Sarok, Nichido, Sangken, Mopin, Oriah etc.