Arinatham 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 Arinatham was 2,542 which includes 1,317 males and 1,225 females. Arinatham covers 483.61 ha area. Pincode of Arinatham is 606115.