Billanahosahalli is a village in Hunsur tehsil in district of Mysore, Karnataka, India. As per the data provided by Census of India in 2011, total population of Billanahosahalli was 481 which includes 234 males and 247 females. Billanahosahalli covers 182.06 ha area. Pincode of Billanahosahalli is 571105.