Ragunathapuram is a village in Ulundurpettai tehsil in district of Viluppuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Ragunathapuram was 736 which includes 370 males and 366 females. Ragunathapuram covers 437.72 ha area. Pincode of Ragunathapuram is 606102.