Babhnaulia is a village in Piprakothi tehsil in district of Purba Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Babhnaulia was 2,018 which includes 1,113 males and 905 females. Babhnaulia covers 138 ha area. Pincode of Babhnaulia is 845437.