Robert George MacDonald (24 February 1886 – 29 March 1960) was a Scottish-American professional golfer and club maker who played in the early 20th century. He had three top-10 finishes in the U.S. Open. His best performance came in 1915 when he was third. He finished eighth in 1916 and tenth in 1920. MacDonald was a frequent competitor in the PGA Championship, his best result coming in 1919 when he finished T3.