Alexander Mackay (11 May 1833 – 18 November 1909) was a New Zealand farmer, explorer, linguist, magistrate and land court judge.
He was born in Edinburgh, Midlothian, Scotland on 11 May 1833.
He married Hannah Sarah Gibbs at Collingwood, a daughter of William Gibbs.Mackay died at Feilding on 18 November 1909, and was buried at Feilding Cemetery.