Major Sir Benn Jack Brunel Cohen KBE (5 October 1886 – 11 May 1965) was a British Conservative Party politician and campaigner on behalf of disabled people.

Cohen volunteered for military service in 1906, joining a territorial battalion of the King's Liverpool Regiment.

Meanwhile, two elder brothers joined the Regiment on the Western Front in France, where one was killed in action and the second was gassed.

He was promoted to Major in June 1917, but was wounded at the Third Battle of Ypres, and both legs were amputated above the knee.

He advocated rapprochement after the First World War between the former enemy nations, and spoke at the first International Conference of the Fédération Interalliée des Anciens Combattants in New Orleans in 1922.

Cohen served as an army welfare officer for the Auxiliary Territorial Service in the Second World War.