Robert Sutherland Rattray, CBE, known as Captain R. S. Rattray (1881, India – 1938) was an early Africanist and student of the Ashanti. He was one of the early writers on Oware, and on Ashanti gold weights.
Rattray was born in India of Scottish parents. In 1906 he joined the Gold Coast Customs Service. In 1911 he became the assistant District Commissioner at Ejura. Learning local languages, he was appointed head of the Anthropological Department of Asante in 1921. He retired in 1930. He was killed while flying a glider in 1938.