Kottaiyur is a village in Valangaiman tehsil in district of Thiruvarur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kottaiyur was 2,390 which includes 1,188 males and 1,202 females. Kottaiyur covers 328.3 ha area. Pincode of Kottaiyur is 614404.