Basa Theog is a village in Theog tehsil in district of Shimla, Himachal Pradesh, India. As per the data provided by Census of India in 2011, total population of Basa Theog was 104 which includes 53 males and 51 females. Basa Theog covers 13.98 ha area. Pincode of Basa Theog is 171201.