Kilakadayam is a village in Ambasamudram tehsil in district of Tirunelveli, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kilakadayam was 15,135 which includes 7,444 males and 7,691 females. Kilakadayam covers 1429.53 ha area. Pincode of Kilakadayam is 627415.