Reginald "Reg" Douglas (born 1930) is a former New Zealand rower. At the 1954 and 1958 British Empire and Commonwealth Games he twice won the gold medal in the men's coxless pair alongside Bob Parker. He also won the silver medal in the men's double sculls at the 1954 British Empire Games also partnering Bob Parker.He competed at one Olympic Games in 1956 in Melbourne where he placed 3rd in the first semi-final in the coxless pair.