Irene Catherine Pirie-Milton (June 7, 1914 – December 1998), née Irene Catherine Pirie, was a Canadian champion swimmer who competed internationally in freestyle events. At the 1930 British Empire Games in Hamilton, Ontario, she was a member of the Canadian team which won the silver medal in the 4×100-yard freestyle relay event. At the 1934 British Empire Games in London, she won a gold medal with the Canadian team in the 4×100-yard relay competition. She also won a silver medal in the 100-yard freestyle and a bronze medal in the 440 yard freestyle.