Lahsani is a village in Belthara Road tehsil in district of Ballia, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Lahsani was 3,819 which includes 1,895 males and 1,924 females. Lahsani covers 749.75 ha area. Pincode of Lahsani is N/A.