Kotamarthi is a village in Mothkur tehsil in district of Nalgonda, Telangana, India. As per the data provided by Census of India in 2011, total population of Kotamarthi was 2,460 which includes 1,224 males and 1,236 females. Kotamarthi covers 1766 ha area. Pincode of Kotamarthi is 508277.