Gang Mouthan is a village in Biswanath tehsil in district of Sonitpur, Assam, India. As per the data provided by Census of India in 2011, total population of Gang Mouthan was 1,436 which includes 713 males and 723 females. Gang Mouthan covers 122.74 ha area. Pincode of Gang Mouthan is 784167.