Thathangudi is a village in Kuthalam tehsil in district of Nagapattinam, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thathangudi was 2,199 which includes 1,091 males and 1,108 females. Thathangudi covers 328.69 ha area. Pincode of Thathangudi is 609404.