Sinai Nadi is a village in Donka tehsil in district of Karbi Anglong, Assam, India. As per the data provided by Census of India in 2011, total population of Sinai Nadi was 555 which includes 276 males and 279 females. Sinai Nadi covers 62 ha area. Pincode of Sinai Nadi is 782425.