Lachhnauta 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 Lachhnauta was 1,573 which includes 836 males and 737 females. Lachhnauta covers 309.6 ha area. Pincode of Lachhnauta is 845453.