Area : 3,790 sq km
Total Population : 13,27,929
Male : 6,80,231
Female : 6,47,698
Sex Ratio : 952 female per 1000 male
Density : 350 persons per sq km
Literacy Rate : 69.66%
Male : 77.18%
Female : 61.73%
District HQ : Tinsukia
Sub-Division : Three.
Sub-Division : HQ
Tinsukia- Tinsukia Town
Boundaries: Arunachal Pradesh, Dhemaji and Brahma-putra river on the north; Arunachal Pradesh on the east; Aruna-chal Pradesh on the south; and Dibrugarh on the west.
Main Rivers & Tributaries : Brahmaputra, Burhi-Dihing, Na-Dihing, Doomdooma, Dangari, Tingrai, Tipling.
Important Places : Tinsukia, Makum, Margherita, Digboi. Lidu, Sadiya.
Tinsukia is the State’s eastern most district of the southern bank. The ancient name of Tin-sukia was Bengmora, which was originally known as Changmai Pathar. During the Ahom rule a few portion of Dibrugarh district and Tinisukia district were included to form Muttack kingdom. Sarbananda Singha was the first Muttack king. The first capital of this kingdom was established in Rangagarha on the bank of Guijan River. The capital was shifted to Bengmora in 1791. The formation of Muttack kingdom is an important incident of the Assam history. Previously included under the Ahom kingdom, this region was inhabited by the Moamoria (or Muttack) people. But due various indifferences. they declared rebellion against the Ahom king. They defeated the Ahom army and established their own Kingdom. . After establishing the capital in Bengmora. king Sarbanada Singha built a new town here with the help of his minister Godha Borbaruah. As per direction of Sarbananda Singha, Godha Borbaruah dug a triangular shaped pond at Bengmora which is known as ‘Tinikonia Phukhurr. Later in 1884, during the construction of Dibru-Sadiya rail line, a station was built near the ‘Tinikonia Phukhuri’ and it was named Tinsukia. Since then this place is known as Tinsukia and later the district formed with this town as the headquarter was also named as Tinsukia. Muttack king Sarbanada Singha dug out a few significant ponds here. Those are Chowlkhua Pakhuri, Kadamini Pukhuri, Da-Dharua Pukhuri, Mandhowa Pukhuri, Logoni Pukhuri. Na-Pukhuri, Bator Pukhuri, Devi Pukhuri, Kumbhi Pukhuri, Rupahi Pukhuri etc Moreover, Muttack kings also built many roads to facilitate the transportation. Those are Godha Borbaruah Path, Rongagada Path, Rajgarh Path and Hatiyali Path. Sarbananda Singha promoted coins marked with his emblem. He also transcribed Swargadeo on the coins of 1716 and 1717 saka. Later at the battle of with Maan, Muttack King fought valiantly On 24,’ February, 1826, according to the Yandaboo Treaty the whole Assam (including Tinsukia region) went under the British, but the British had already entered in this region In 1823 the British discovered tea plants near Sadiya and in Chabua (currently nearby the Tinsukia town) first tea plantation took place In 1876, coal store was discovered in Ledo and Margherita of Tinsukia district. In 1889, crude oil was struck in Digboi and the first refinery of the country was established in Digboi in 1901. In 1882, Dibru-Sadiya rail line was built through Tinisukia. This railway contributed a lot to the economic growth of this region. Tinsukia, the district headquarter town was where the past Matak Kings had heroically fought against the Burmese Lords. It is now a railway junction and serves as the most important commercial centre of East Assam. Well connected with other important places of the district it had been a centre of trade and idustry since the 19′” century. The country’s oldest oil refinery, Digboi Refinery is in this district Digboi is an old oil town. Crude oil was first found in 1825, at a place inside a deep forest near Namchik area. In 1889, oil production started on commercial basis at Digboi. That was the first ever production of oil on commercial basis in India as well asAsia. In the form of crude production, Digboi contributes immensely towards the growth of the Country’s economy. The first oil refinery of Assam was established here in 1901. A lot of valuable wood is available in the reserved ferests near by Digboi. Another important place of Tinsukia district Doomdooma is famous for tea industry, crude oil, natural gas and wood industry.