Barry K. Barnes (27 December 1906, London, England – 12 January 1965, London, England) was a British film actor. He was born and died in London. He appeared in sixteen films between 1936 and 1947. He played Sir Percy Blakeney in the 1937 film Return of the Scarlet Pimpernel. His film career was cut short in 1947 due to an undiagnosable illness contracted during the war.