Thellar is a village in Vandavasi tehsil in district of Tiruvannamalai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thellar was 7,107 which includes 3,493 males and 3,614 females. Thellar covers 948.41 ha area. Pincode of Thellar is 604406.