Sivasagar district {Pron: ˈsɪvəˌsʌgə(r) or ˈʃɪvəˌsʌgə(r)} , formerly known as Sibsagar, is one of the 32 districts of Assam state in north-eastern India. Sivasagar city is the administrative headquarters of this district.It is known for its rich and diverse biodiversity. The districts covers an area of 2668 square kilometers as against total area of 78438 square kilometers of Assam as per census of 2001. The district comprises two sub-divisions – Sivasagar and Nazira. The district of Sivasagar lies between 26.45°N and 27.15°N latitudes and 94.25°E and 95.25°E longitudes. The district is bounded by the Brahmaputra River on the north, the Nagaland on the south, the Charaideo district on the east and the Jhanji River on the west. The Sivasagar district has got its definite identity due to its different races, tribes, languages and cultures.