William McInnes (born 1964) is an Australian actor.
William McInnes may also refer to: William Wallace Burns McInnes (1871–1954), Canadian politician William Beckwith McInnes (1889–1939), Australian artist William C. McInnes (1923–2009), American university president, 1964–1973
See also William Joseph McInnes Botanic Garden and Campus Arboretum, Mills College, California, USA