Janakadevanahalli 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 Janakadevanahalli was 387 which includes 191 males and 196 females. Janakadevanahalli covers 172.03 ha area. Pincode of Janakadevanahalli is 572225.