Thatrahalli is a village in Krishnagiri tehsil in district of Krishnagiri, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thatrahalli was 3,271 which includes 1,640 males and 1,631 females. Thatrahalli covers 1038.35 ha area. Pincode of Thatrahalli is 635123.