Kilwa Masoko, also known as Masoko, is an administrative ward located in the Kilwa District of the Lindi Region in Tanzania. It serves as the capital of the Kilwa District.
The ward covers a total area of 200 km² (77 sq mi) and maintains an average elevation of 11 m (36 ft). According to data from the 2012 census, the population of the ward is 13,601.