Thandarai is a village in Denkanikottai tehsil in district of Krishnagiri, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thandarai was 2,664 which includes 1,349 males and 1,315 females. Thandarai covers 945.48 ha area. Pincode of Thandarai is 635110.