B T Mallenahalli is a village in Kadur tehsil in district of Chikmagalur, Karnataka, India. As per the data provided by Census of India in 2011, total population of B T Mallenahalli was 1,277 which includes 601 males and 676 females. B T Mallenahalli covers 686 ha area. Pincode of B T Mallenahalli is 577182.