!Tinsukia District Tinsukia is a district in the state of Assam in India. It is located in the upper part of Assam in between Longitude 95°22' to 95°38'E and Latitude 27°23' to 27°48'N. The district is bounded in the east-south by Arunachal Pradesh, in the south-west by Dibrugarh District, and in north by Dhemaji District which is separated from Tinsukia District by the mighty river Brahmaputra. The District is spread over an area of 3790 sq km. Population of the district as per census 2011 was 1327929. The Tinsukia Sub-Division of un-divided Dibrugarh District was declared as the 23rd District of Assam on 1st October'1989. It consists of three sub-division viz Tinsukia(Sadar), Margherita and Sadiya.There are 7 development blocks and 1162 villages in the district out of which 24 are uninhabited. The ancient name of Tinsukia was Bangmara which was orginally known as Changmai Pathar. It was the capital of the Muttack Kingdom. The Bangmara city was built by King Sarbananda Singha with the help of his Minister Gopinath Barbaruah alies Godha who dug a triangular shaped pond in Bangmara known as "Tinikunia Pukhuri". In 1884 Dibru-Sadiya Rail line was constructed and a station was set up near the "Tinikunia Phukhuri" which was named as Tinsukia. Since then the city has been known as Tinsukia.