Narpatnagar is a village in Pandaul tehsil in district of Madhubani, Bihar, India. As per the data provided by Census of India in 2011, total population of Narpatnagar was 7,860 which includes 4,032 males and 3,828 females. Narpatnagar covers 397.25 ha area. Pincode of Narpatnagar is 847239.