Kilavallanadu 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 Kilavallanadu was 1,165 which includes 575 males and 590 females. Kilavallanadu covers 2848.8 ha area. Pincode of Kilavallanadu is 628851.