William Mackey

William Mackey may refer to:


 * William Mackey (Fenian) (1841–1884), member of the Fenian Brotherhood and the Clan na Gael
 * William Mackey (Jesuit) (1915–1995), Canadian Jesuit educationist and founder of the modern educational system of Bhutan
 * William F. Mackey (1858–1912), American lawyer and politician from New York
 * William Davis Mackey (1913–?), American lawyer and politician from Indiana
 * Bill Mackey (1927–1951), American racecar driver