Duncan Macintosh or Duncan Mackintosh may refer to:
Duncan Mackintosh, 11th of Mackintosh (died 1496), chief of the Clan Mackintosh Duncan Mackintosh (died 1689), pirate active in the Indian Ocean Duncan Macintosh (died 1966), first Commissioner of Police in Hong Kong after World War II Duncan Mackintosh, 31st Chattan (died 1966), 31st Chief of Clan Chattan
It may also refer to:
Duncan McIntosh Company, an American publisher of periodicals