Semardah Nankar is a village in Suppi tehsil in district of Sitamarhi, Bihar, India. As per the data provided by Census of India in 2011, total population of Semardah Nankar was 1,427 which includes 764 males and 663 females. Semardah Nankar covers 74 ha area. Pincode of Semardah Nankar is 841331.