Kamal Dah is a village in Bathnaha tehsil in district of Sitamarhi, Bihar, India. As per the data provided by Census of India in 2011, total population of Kamal Dah was 12,826 which includes 6,670 males and 6,156 females. Kamal Dah covers 781 ha area. Pincode of Kamal Dah is 843322.