William Mackintosh

William Mackintosh, MacIntosh, McIntosh or M'Intosh may refer to:
 * Captain William Mackintosh, Irish-born British Army officer and Canadian engineer
 * W. A. Mackintosh William Archibald Mackintosh, (1895–1970), Canadian academic
 * William Mackintosh, Lord Kyllachy (1842–1918), Scottish advocate
 * Mackintosh of Borlum (1658–1743), Scottish soldier
 * William M'Intosh (1838–1931), also spelt McIntosh, Scottish physician and marine zoologist
 * William MacKintosh (fur trader) (1784-1842), worked for the Hudson's Bay Company, in Rupertland