Kottaiyur is a village in Kallakkurichi tehsil in district of Viluppuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kottaiyur was 1,698 which includes 859 males and 839 females. Kottaiyur covers 444.47 ha area. Pincode of Kottaiyur is 606305.