John Hoani "Jack" Macdonald (26 October 1907 – 1 January 1982) was a New Zealand sportsman. He competed in rowing at the 1930 Empire Games, winning gold in the coxed fours, and at the 1932 Summer Olympics, becoming one of the first two Māori Olympians. He played rugby union for New Zealand Māori from 1926 to 1935 and professional rugby league in England from 1935 to 1939.