Lain Bazar is a village in Hathua tehsil in district of Gopalganj, Bihar, India. As per the data provided by Census of India in 2011, total population of Lain Bazar was 4,229 which includes 2,137 males and 2,092 females. Lain Bazar covers 97.37 ha area. Pincode of Lain Bazar is N/A.