Alexander McKay
Alexander McKay or MacKay may refer to:
- Alexander McKay (boxer) (1804–1830), Scottish heavyweight bare-knuckle fighter
- Alexander McKay (politician) (1843–1912), mayor of Hamilton, Ontario, 1886–1887
- Alexander Mackay (British Army officer) (1717–1789), British general and Member of Parliament
- Alexander MacKay (politician) (b. 1818), merchant and politician in Nova Scotia, Canada
- Alexander Gordon McKay (1924–2007), Canadian academic who specialized in Vergilian studies
- Alexander Murdoch Mackay (1849–1890), Presbyterian missionary to Uganda
- Alexander MacKay (fur trader) (1770–1811), business associate of fur trader Duncan Cameron
- Alexander Grant MacKay (1860–1920), Canadian teacher, lawyer and provincial level politician
- Alex MacKay, character in 1632 series