In 1953 a circle headquarter was established at Daporijo. The Circle was later on upgraded to a sub-division in 1957 followed by merger of some more area from notrheast bank of river Subansiri in 1959. the sub-division was headed by one Additional Political Officer. The Post of Additional Political Officer was re-designated in the year 1964 as Add. Deputy Commissioner. The District was created in the year 1980 in the name of Upper Subansiri.
Area covered by the district is approximate 7032 sq. kms at latitude between 27.45 degree and 28.42 degree North and Longitude between 93.18 degree and 94.36 degree East. West Siang district falls at Ease and partly at South and lower Subansiri district at West and Partly at South. The Mc Mohan line borders China at north.
The district is mountainous rugged and difficult terrain. The river Subansiri has intersected the terrain. Snow-caved Mountains ranges of height from 7000ft. to 18000 ft. (above sea level) stand like barrier at north. Most land is barren and inhabitation is scanty. The region is mostly covered by dense forest consisting Aplne, moist temperature tropical pine and temperate we evergreen forests in upper, uppler middle, middle and lower region respectively. The district is rich in flora and fauna.
The climate in the district region is varied as rainfall and temperature differs from place to place. Average rainfall recorded at district headquarter, Daporijo for the year 2002 is 153.3 mm. the district is gifted with temperate and subtropical sets of climate condition.
Population, Tribe and Occupation
population of the district is 83448 as per census, 2011 spreaded over 551 villages. Indigenous population is scheduled tribes comprising Tagin, Galo, Nyishi.
Main occupation of indigenous people is agriculture. Jhum cultivation is largely practicd besides permanent cultivation and other cash crops to a limited extent. However, trend of permanent cultivation is comming up increasingly despite constraints of uncongenial antagonistic terrenial toughness.
The literacy is 63.96 percent as per Consus 2011. Male and female literacy is 67.36:60.51 respectively.
Due to lake of adequate infrastructural support, the mineral resuource of the district is lying unexplored. However, availability of limestone and graphite has been reported. Forest is the major resource in the district. It provides building materials, cooking fuel and edible fruits to the rural as well the urban prople. The district has immense potentiality of hydro electric power generation by taping the water resources. Two hydro electric projects have been taken up by the Govt. and works under NHPC is on at full swing.
The district headquarter is linked by surface communication with Kimin via Ziro and Sliapather via Basar. Similarly the circle head quarter of Dumporijo, Baririjo, Taliha, Giba, Siyum, Nacho, Puchigeko and Limeking are connected with road communication from district headquarter. A large number of rural link roads are under construction.