Achamanahalli 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 Achamanahalli was 228 which includes 112 males and 116 females. Achamanahalli covers 272.56 ha area. Pincode of Achamanahalli is 571436.