Duadangi is a village in Bahadurganj tehsil in district of Kishanganj, Bihar, India. As per the data provided by Census of India in 2011, total population of Duadangi was 2,022 which includes 1,021 males and 1,001 females. Duadangi covers 193 ha area. Pincode of Duadangi is N/A.