Kamarajanahalli 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 Kamarajanahalli was 577 which includes 297 males and 280 females. Kamarajanahalli covers 185.08 ha area. Pincode of Kamarajanahalli is 572129.