Dr Henry 'Harry' Windsor (27 October 1914 – 20 March 1987) was an Irish-born Australian cardiac surgeon. He trained at Queensland University and then the University of Sydney, gaining second-class honours in medicine and graduating in 1939 with a Bachelor of Medicine. He worked at St Vincent's Hospital, Sydney for numerous years and pioneered several surgical procedures in Australia In 1968 he carried out Australia's first heart transplant. He was a mentor to renowned heart surgeon Victor Chang.