Thammadahalli is a village in Piriyapatna tehsil in district of Mysore, Karnataka, India. As per the data provided by Census of India in 2011, total population of Thammadahalli was 1,992 which includes 1,021 males and 971 females. Thammadahalli covers 530.24 ha area. Pincode of Thammadahalli is 571108.