Duncan MacKay

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)