Raphael Ernest Grail Armattoe (12 August 1913 – 22 December 1953) was a Ghanaian scientist and political activist.

He was called by the New York Post "the 'Irishman' from West Africa", and the BBC producer Henry Swanzy referred to him as the "African Paracelsus".

He then got a locum job in Belfast, Northern Ireland, and following that worked at the Civil Defence first-aid post in Brooke Park, Derry, between 1939 and 1945.

[6] Through association with international scientific societies he is regarded as one of the very few scientists at the time to understand atomic energy.

[3] Later in 1948 he returned to West Africa, where he conducted research mainly on Ewe physical anthropology but also set up a medical clinic at Kumasi in the Ashanti Region.

[4] Armattoe and Kwame Nkrumah first met at the 1945 Pan-African Congress in Manchester;[7] a conference attended by many future Ghanaians politicians as well as Hastings Banda, Jomo Kenyatta and W. E. B.

[3][12] His father Glikpo Armattoe was a merchant of Palime, Togoland, who traded mainly with the Germans and also studied local indigenous languages.

[3] A blue plaque in his honour was unveiled by the Ulster History Circle at 7 Northland Road, Derry, where Armattoe lived from 1939 to 1945 and carried on his practice as a GP.