Sasthavinallur is a village in Sathankulam tehsil in district of Thoothukkudi, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Sasthavinallur was 4,321 which includes 2,047 males and 2,274 females. Sasthavinallur covers 1209.94 ha area. Pincode of Sasthavinallur is 628702.