Gopalpur is a village in Saraigarh Bhaptiyahi tehsil in district of Supaul, Bihar, India. As per the data provided by Census of India in 2011, total population of Gopalpur was 2,305 which includes 1,200 males and 1,105 females. Gopalpur covers 292 ha area. Pincode of Gopalpur is 852215.