Thomas Anthony Devas (8 January 1911 – 21 December 1958) was a British portrait painter who was associated with members of the Euston Road School.

During the Second World War, Devas served as an air raid warden in London as his persistent ill-health had excluded him from military service.

[3] The War Artists' Advisory Committee, WAAC, commissioned several portraits from Devas of individuals who had distinguished themselves in the conflict, including Wilfred Thesiger, Captain George Hunt[5] and dispatch rider Pamela McGeorge, At other points in the war WAAC purchased a number of portraits from Devas,[6] including one of the Matron of Charing Cross Hospital.

In 1943 he became a member of the New English Art Club and in 1945 he was elected to the Royal Society of Portrait Painters.

During the 1950s Devas produced at least nine portraits of young women for the Aero Girls advertising campaign run by J Walter Thompson for Rowntree's chocolate.