William McCormack was premier of Queensland.
William McCormack may also refer to:
William J. McCormack (police officer) (1933–2016), chief of police of the Metro Toronto Police William Jerome McCormack (1924–2013), American prelate of Roman Catholic Church William J. McCormack (businessman) (1890–1965), New York City businessman William McCormack (cricketer) (1877–1946), Australian cricketer
See also Will McCormack (born 1974), American television and film actor Billy McCormack (disambiguation) John W. McCormack (John William McCormack, 1891–1980), speaker of the United States House of Representatives
William McCormick (disambiguation)