Baron Macdonald, of Slate in the County of Antrim, is a title in the Peerage of Ireland. It was created in 1776 for Sir Alexander Macdonald, 9th Baronet, of Sleat. The Macdonald family descends from Uisdean Macdonald (died 1498), also known as Hugh Macdonald, illegitimate son of Alexander Macdonald, Earl of Ross. On 28 May 1625, his great-great-great-great-grandson Archibald Macdonald was created a baronet, of Sleat in the Isle of Skye in the County of Inverness, in the Baronetage of Nova Scotia. The baronetcy was created with remainder to heirs male whatsoever and with a special clause of precedence which provided that it should have precedency over all former baronets (Sir Robert Gordon excepted).