Biswanath is a small city and a municipal board in Biswanath district in the state of Assam, India. This city is the district headquarters of Biswan…Biswanath is a small city and a municipal board in Biswanath district in the state of Assam, India. This city is the district headquarters of Biswanath district, which was created on 15 August 2015. Biswanath has a very important historical significance. It formed the borders between Kamata kingdom and Chutiya kingdom, and later between Koch kingdom and Ahom kingdom. Ruins of fort like Pratapgarh, Buroi, etc. still exist which were built by Chutia kings.