Kadalaiyur is a village in Ettayapuram tehsil in district of Thoothukkudi, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kadalaiyur was 3,857 which includes 1,934 males and 1,923 females. Kadalaiyur covers 909.62 ha area. Pincode of Kadalaiyur is 628725.