Nathu Doar is a village in Khanpur tehsil in district of Samastipur, Bihar, India. As per the data provided by Census of India in 2011, total population of Nathu Doar was 7,695 which includes 4,017 males and 3,678 females. Nathu Doar covers 855 ha area. Pincode of Nathu Doar is 848236.