Alexander McKay (c. 1804 – 3 June 1830) was a Scottish heavyweight bare-knuckle fighter.
He fought in just five prize fights, these are: McKay died of a brain haemorrhage 30 hours after his second fight against Byrne.
The news of his death was greeted in his native Scotland by rioting in which several died.
He is buried in churchyard in the village of Hanslope, Buckinghamshire.
This biographical article related to boxing in Scotland is a stub.