Kunnathur is a village in Cheyyar tehsil in district of Tiruvannamalai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kunnathur was 1,433 which includes 718 males and 715 females. Kunnathur covers 322.06 ha area. Pincode of Kunnathur is 604407.