Kilaiyur is a village in Chengam tehsil in district of Tiruvannamalai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kilaiyur was 1,124 which includes 580 males and 544 females. Kilaiyur covers 413.18 ha area. Pincode of Kilaiyur is 606710.