Ban Bairia is a village in Gaunaha tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Ban Bairia was 1,425 which includes 725 males and 700 females. Ban Bairia covers 300.3 ha area. Pincode of Ban Bairia is N/A.