Regunathapuram is a village in Pattukkottai tehsil in district of Thanjavur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Regunathapuram was 283 which includes 140 males and 143 females. Regunathapuram covers 85.38 ha area. Pincode of Regunathapuram is 614613.