Kalvay is a village in Srivaikuntam tehsil in district of Thoothukkudi, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kalvay was 3,266 which includes 1,588 males and 1,678 females. Kalvay covers 1116.9 ha area. Pincode of Kalvay is 628622.