Hariharpur Lalgarh is a village in Barharia tehsil in district of Siwan, Bihar, India. As per the data provided by Census of India in 2011, total population of Hariharpur Lalgarh was 4,456 which includes 2,236 males and 2,220 females. Hariharpur Lalgarh covers 348 ha area. Pincode of Hariharpur Lalgarh is 841434.