Duncan McMillan "Mickey" MacKay (May 25, 1894 – May 30, 1940) was a Canadian professional ice hockey centre and rover who played primarily in the Pacific Coast Hockey Association (PCHL) and Western Canada Hockey League (WCHL) for the Vancouver Millionaires (later Maroons). He moved to the National Hockey League (NHL) after the collapse of professional hockey in the west, and finished his career playing with the Chicago Black Hawks, Pittsburgh Pirates and Boston Bruins.
A gifted scorer, MacKay led the PCHA in goals three times, assists twice, and was the league's all-time leading scorer upon its demise.
