William Galbraith may refer to:
William Galbraith (mathematician) (1786–1850), Scottish mathematician William Galbraith (athlete) (1885–1937), Canadian athlete at the 1908 Summer Olympics William Galbraith (American football), former head coach of the Syracuse college football program William Galbraith (gymnast) (1906–1994), American gymnast and Olympic medalist at the 1920 Summer Olympics William E. Galbraith (1926–2012), National Commander of the American Legion William Galbraith (British Army officer) (1837–1906), Adjutant-General in India William J. Galbraith (1837–1907), justice of the territorial Montana Supreme Court