Duncan MacKay or McKay may refer to:
- Duncan MacKay (footballer) (1937–2019), Scottish former footballer
- Duncan Mackay (musician) (born 1950), British composer, singer and musician
- Mickey MacKay (Duncan McMillan MacKay, 1894–1940), Canadian ice hockey centre
- Duncan McKay, a character from Monarch of the Glen (TV series)
This disambiguation page lists articles about people with the same name.
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