Obannanahalli is a village in Challakere tehsil in district of Chitradurga, Karnataka, India. As per the data provided by Census of India in 2011, total population of Obannanahalli was 2,209 which includes 1,159 males and 1,050 females. Obannanahalli covers 1214.25 ha area. Pincode of Obannanahalli is 577529.