Narha Kalyan is a village in Bajpatti tehsil in district of Sitamarhi, Bihar, India. As per the data provided by Census of India in 2011, total population of Narha Kalyan was 1,718 which includes 938 males and 780 females. Narha Kalyan covers 117 ha area. Pincode of Narha Kalyan is 843315.