Thonachanahalli is a village in Gubbi tehsil in district of Tumkur, Karnataka, India. As per the data provided by Census of India in 2011, total population of Thonachanahalli was 562 which includes 276 males and 286 females. Thonachanahalli covers 339.08 ha area. Pincode of Thonachanahalli is 572117.