Hussainganj is a Sub-District (Tehsil/Block/Mandal) in the Siwan District of Bihar. As par Census 2011 information the sub-district code of Hussainganj is 01238. There are about 19 sub-districts in Siwan and Hussainganj is one of them. Andar, Barharia, Basantpur, Bhagwanpur Hat, Darauli, Daraundha, Goriakothi, Guthani, Hasanpura, Lakri Nabiganj, Maharajganj, Mairwa, Nautan, Pachrukhi, Raghunathpur, Siswan, Siwan, Ziradei etc. are other sub-districts in Siwan.There are about 46 villages in Hussainganj sub-district, which you can browse from villages list.