Bairia is a village in Narkatiaganj tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Bairia was 2,730 which includes 1,410 males and 1,320 females. Bairia covers 115.3 ha area. Pincode of Bairia is N/A.