Theerthamalai is a village in Harur tehsil in district of Dharmapuri, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Theerthamalai was 2,055 which includes 1,013 males and 1,042 females. Theerthamalai covers 200.43 ha area. Pincode of Theerthamalai is 636906.