Mianapur Dubauli is a village in Bairia tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Mianapur Dubauli was 9,639 which includes 5,057 males and 4,582 females. Mianapur Dubauli covers 572.2 ha area. Pincode of Mianapur Dubauli is 845438.