Therkupanaiyur is a village in Thirukkuvalai tehsil in district of Nagapattinam, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Therkupanaiyur was 1,778 which includes 885 males and 893 females. Therkupanaiyur covers 464.86 ha area. Pincode of Therkupanaiyur is 610207.