East Kameng district is one of the 16 districts of Arunachal Pradesh state in northeastern, India. It shares an international border with Tibet in the north and Bhutan to the west, a state border with Assam and district borders with West Kameng, Papumpare and Kurung Kumey, which was bifurcated from Lower Subansiri district on 1 April 2000.

The area around the Kameng river has at various times come under the control and influence of the Mon kingdoms, Tibet and the Ahom kingdom. Aka and Nishi chiefs would exert control over the area whenever no major political powers dominated the area.

The Kameng Frontier Division was renamed as the Kameng District. The Political Officer was also redesignated as the Deputy Commissioner of Kameng. However, for political reasons, the Kameng district was bifurcated between East Kameng and West Kameng on 1 June 1980.

The 2,000-kilometre-long (1,200 mi) proposed Mago-Thingbu to Vijaynagar Arunachal Pradesh Frontier Highway along the McMahon Line, (will intersect with the proposed East-West Industrial Corridor Highway) and will pass through this district, alignment map of which can be seen here

Most tribes practise a form of slash and burn agriculture known as Jhum. After clearing the land, crops like barley and rice are planted, and fruit trees are planted to make orchards. Fishing activities first started between 1965–66 and gained momentum in November 1980, when the Fishery Department first started functioning independently. As of today, the Fishery development activities are headed by a District Fishery Development Officer, who was originally the Superintendent of Fisheries. However, this department was understaffed. Funds were also given for rural agriculture and Paddy-cum-Fish Culture activities.

With the advancement of modern technology, horticulture based on apples and oranges is becoming increasingly popular. Today, temperate and sub-tropical fruits are planted in orchards with chemical fertilizers.

The Koro is a Tibeto-Burman language spoken by approximately 800–1200 people in the East Kameng district who live among the Aka (Hruso), but their language is distantly related, with distinct words for basic vocabulary. Although it has resemblances to Tani further to the east, it appears to be a separate branch of Tibeto-Burman. Koro is unlike any language in the various branches of the Tibeto-Burman family. Researchers hypothesize it may have originated from a group of people enslaved and brought to the area.

Koro was recognised as a separate language in 2010 by a linguistic team of David Harrison, Gregory Anderson, and Ganesh Murmu while documenting two Hruso languages (Aka and Miji) as part of National Geographic’s “Enduring Voices” project. It was apparently noticed by earlier researchers