Sivasagar is a town and headquarter of the Sivasagar district, Assam. Sivasagar is situated about 360 kilometers (224 mi) northeast of Guwahati. It is well known for its Ahom palaces and monuments. Sivasagar is an important centre for tea and oil industries today.

Sivasagar district, formerly known as Sibsagar, is one of the 34 districts of Assam state in Northeast India. Sivasagar city is the administrative headquarters of this district. This historic place is also known for its rich biodiversity. The districts covers an area of 2668 square kilometers. 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 to the north, Nagaland to the south, the Charaideo district to the east and the Jhanji River to the west. The Sivasagar district has acquired its distinct identity due to the co-existence of different races, tribes, languages and cultures.