Kalangathankottai is a village in Ilayangudi tehsil in district of Sivaganga, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kalangathankottai was 1,081 which includes 524 males and 557 females. Kalangathankottai covers 401.05 ha area. Pincode of Kalangathankottai is 630710.