The Rt Hon. Alexander Montgomerie, 10th Earl of Eglinton (10 February 1723 – 25 October 1769), was a wealthy Scottish peer and landowner. Lord Eglinton was mortally wounded on the beach near his stables at Parkhouse on his own estate of Ardrossan in Ayrshire by an excise officer (Scots: Gaudger) named Mungo Campbell on 24 October 1769, following a dispute about poaching and the latter's right to bear arms on the Earl's grounds.