Lakhnaur is a village in Lakhnaur tehsil in district of Madhubani, Bihar, India. As per the data provided by Census of India in 2011, total population of Lakhnaur was 16,774 which includes 8,750 males and 8,024 females. Lakhnaur covers 1293 ha area. Pincode of Lakhnaur is 847403.