Karathanahalli is a village in Krishnarajpet tehsil in district of Mandya, Karnataka, India. As per the data provided by Census of India in 2011, total population of Karathanahalli was 164 which includes 81 males and 83 females. Karathanahalli covers 57.37 ha area. Pincode of Karathanahalli is 571426.