Mariyanahosur 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 Mariyanahosur was 113 which includes 56 males and 57 females. Mariyanahosur covers 132.44 ha area. Pincode of Mariyanahosur is 571423.