Lachhnauta is a village in Lauriya tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Lachhnauta was 1,339 which includes 731 males and 608 females. Lachhnauta covers 178.98 ha area. Pincode of Lachhnauta is 845453.