Herajenahalli is a village in Koratagere tehsil in district of Tumkur, Karnataka, India. As per the data provided by Census of India in 2011, total population of Herajenahalli was 272 which includes 132 males and 140 females. Herajenahalli covers 360.33 ha area. Pincode of Herajenahalli is 572129.