Harpur Kotwa is a village in Hasanpura tehsil in district of Siwan, Bihar, India. As per the data provided by Census of India in 2011, total population of Harpur Kotwa was 1,943 which includes 944 males and 999 females. Harpur Kotwa covers 255.18 ha area. Pincode of Harpur Kotwa is 841240.