Silamalai is a village in Bodinayakanur tehsil in district of Theni, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Silamalai was 8,236 which includes 4,136 males and 4,100 females. Silamalai covers 2076.33 ha area. Pincode of Silamalai is 625528.