Mahinathpur is a village in Rajnagar tehsil in district of Madhubani, Bihar, India. As per the data provided by Census of India in 2011, total population of Mahinathpur was 5,552 which includes 3,133 males and 2,419 females. Mahinathpur covers 471.09 ha area. Pincode of Mahinathpur is 847235.