Bhaunathpur is a village in Sultanganj tehsil in district of Bhagalpur, Bihar, India. As per the data provided by Census of India in 2011, total population of Bhaunathpur was 3,989 which includes 2,114 males and 1,875 females. Bhaunathpur covers 224 ha area. Pincode of Bhaunathpur is 811211.