Donald Cargill, a Scotch Presbyterian and Covenanter, and a leader of the Cameronians in and after the Sanquhar declaration, born in the parish of Rattray, Perthshire, about 1610, executed in Edinburgh, July 27,1681. He was educated at Aberdeen, and became minister of Barony parish of Glasgow some time after the division among the clergy in 1650. In 1661, refusing to accept collation from the archbishop and to celebrate the king's birthday, he was banished beyond the Tay, but paid no attention to the act. In 1668 he was called before the council, and peremptorily commanded to depart. When indulgence was proclaimed to the Presbyterian ministers, he refused to accept it, and made a stand with others at Bothwell Bridge against the royal forces. He was severely wounded, and compelled to flee to Holland, but was again in Scotland in 1680, and, with a like-minded enthusiast named Hall, lurked around Queen's Ferry for several months, eluding the vigilance of the authorities, till June 3, when both were arrested, and Hall was killed in the affray. On the person of Hall was found the violent paper known in the ecclesiastical history of Scotland as the "Queen's Ferry Covenant." On June 22, with Cameron and others, Cargill made the famous Sanquhar declaration.

In September following, after he had preached to a congregation in the Torwood, between Falkirk and Stirling, he pronounced excommunication against the king and other state dignitaries, because they had usurped the supremacy of the pure church of Scotland. He was now excommunicated, and a reward set on his head. In May, 1681, he was apprehended at Covington, Lanarkshire, and taken to Edinburgh, where he was hanged and beheaded, for high treason.