Pillayarnatham is a village in Kovilpatti tehsil in district of Thoothukkudi, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Pillayarnatham was 2,042 which includes 1,013 males and 1,029 females. Pillayarnatham covers 1743.71 ha area. Pincode of Pillayarnatham is 628721.