Somanathapuram is a village in Kallakkurichi tehsil in district of Viluppuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Somanathapuram was 817 which includes 427 males and 390 females. Somanathapuram covers 92.22 ha area. Pincode of Somanathapuram is 606206.