Duncan McMillan "Mickey" MacKay (May 21, 1894 in Chesley, Ontario - May 21, 1940) was a Canadian professional ice hockey defenseman who played for the Chicago Blackhawks, Boston Bruins, and Pittsburgh Pirates in the National Hockey League. He also spent time with the Vancouver Millionaires and Vancouver Maroons of the Pacific Coast Hockey Association.

Mickey was an important member of the Millionaires team that reached 5 Stanley Cup finals and won once. He also helped the Bruins win the Cup in 1929. He was inducted into the Hockey Hall of Fame in 1952.

1894 births | 1940 deaths | Hockey Hall of Fame | Boston Bruins players | Vancouver Millionaires players | Stanley Cup champions