A
- Adam McKay
- Æneas Mackay (1839–1909), Prime Minister of the Netherlands, member and president of the Dutch House of Representatives
- Al McKay
- Alexander McKay (disambiguation) (several people)
- Alfred Edwin McKay
- Allen McKay
- Ami McKay
- Andrew McKay
- Andrew McKay (actor)
- Andy McKay
- Angus McKay (disambiguation) (several people)
- Antonio McKay
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