About Sibsagar Sibsagar, a city in the Indian state of Assam, is located on the left bank of the Brahmaputra River. The city is the district headquarters of Sibsagar district. It was once the capital of the Ahom kingdom. The city is known for its temples, especially the Dakhinpat Satra and the Rang Ghar. The city is well connected by road and rail. The nearest airport is at Jorhat, which is about 55 km away.