Thellanahalli is a village in Palakkodu tehsil in district of Dharmapuri, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thellanahalli was 1,992 which includes 1,040 males and 952 females. Thellanahalli covers 146.44 ha area. Pincode of Thellanahalli is 635111.