Donald Mackay , MacKay , or McKay may refer to:
Donald Mackay, 5th of Strathnaver (died 1370), chief of the ancient Clan MackayDonald Mackay, 11th of Strathnaver (died 1550), chief of the ancient Clan MackayDonald Mackay, 1st Lord Reay (1591–1649), Scottish peer and soldierDonald Mackay (fur trader) (1753–1833), Canadian trader with the North West CompanyDonald Mackay (Royal Navy officer) (1780–1850), British admiralDonald McKay (1810–1880), Canadian-American shipbuilder
Donald McKay (politician) (1836–1895), Canadian politicianDonald McKay (scout) (1836–1899), American scout, actor, and spokesmanDonald Mackay, 11th Lord Reay (1839–1921), Dutch-born British administrator and Liberal politicianDonald McDonald Mackay (1845–1904), Australian politicianDonald MacKay (architect) (c. 1846 – c. 1887 ), Scottish-American architectDonald George Mackay (1870–1958), Australian explorer and long-distance cyclistDonald McKay (footballer) (fl. 1890s), Scottish footballerDonald W. MacKay (1874–1952), Canadian politicianDonald Morrison MacKay (1889–1953), Canadian politicianDonald Brenham McKay , former mayor of Tampa, FloridaDon McKay (politician) (1908–1988), New Zealand politicianDonald Hugh Mackay (1914–1979), mayor of Calgary, AlbertaDonald A. Mackay (1914–2005), illustratorDonald McKay (RAF officer) (1917–1959), British flying ace of the Second World WarDonald MacCrimmon MacKay (1922–1987), Scottish physicistDonald Mackay (anti-drugs campaigner) (1933–1977), Australian politician and anti-drugs campaignerDonald Mackay (scientist) (1936–2023), Scottish-born Canadian scientist of environmental chemistryDon Mackay (born 1940), Scottish football playerDonald Mackay, Baron Mackay of Drumadoon (1946–2018), Scottish judgeDonald Mackay (medical doctor) (died 1981)Donald Mackay-Coghill (born 1941), South African cricketer
