Alexander MacDonald
Alexander or Alex MacDonald may refer to:
- Alasdair mac Mhaighstir Alasdair (c. 1698–1770), aka Alexander MacDonald
- Alexander of Islay, Earl of Ross (died 1449), Scottish nobleman
- Alexander MacDonald, 5th of Dunnyveg (c. 1480–1538), Scoto-Irish chieftain
- Alexander Og MacDonald (died 1613), chief of the MacDonalds of Dunnyveg
- Alexander Og MacDonald, Lord of Islay (died 1299), chief of the MacDonalds
- Alexander Macdonald, 1st Baron Macdonald (c. 1745–1795), Scottish peer
- Alexander Macdonald, 2nd Baron Macdonald (1773–1824), Scottish peer and Member of Parliament
- Alexander Macdonald, 7th Baron Macdonald (1909–1970)
- Alexander Macdonald (antiquary) (1791?–1850), Scottish antiquarian
- Alexander MacDonald (bishop of Victoria) (1858–1941), Canadian Roman Catholic bishop, educator and author
- Alexander Macdonald (Manitoba politician) (1844–1928), Mayor of Winnipeg in 1892
- Alexander Macdonald (British Columbia politician) (born 1918), Canadian Member of Parliament for Vancouver Kingsway
- Alexander Macdonald (Lib–Lab politician) (1821–1881), Scottish miner, teacher, trade union leader and Lib-Lab politician
- Alexander MacDonald (Vicar Apostolic of the Highland District) (1736–1791), Roman Catholic bishop and vicar apostolic in Scotland
- Alexander Francis Macdonald (1818–1913), politician and railway contractor
- Alex MacDonald (footballer, born 1948), Scottish football player and manager
- Alex MacDonald (footballer, born 1990), Scottish football player
- Alex MacDonald (Ontario Libertarian politician)
- Alex Macdonald (trade unionist) (1910–1969), Australian trade unionist
See also
- Alexander Og MacDonald (disambiguation)
- Alexander McDonald (disambiguation)
- Alex McDonald (disambiguation)