John Campbell, 4th Duke of Argyll

Sir John Campbell, 4th Duke of Argyll (c. 1693 - 9 November 1770) was a Scottish Whig politician in the 17th and 18th centuries.

Campbell joined the army at a young age, becoming a lieutenant colonel at the age of nineteen. However, he soon joined the world of politics, becoming MP for County Bute (1713-1715), Elgin Burghs (1715-1722 and 1725-1727), and finally Dunbartonshire (1727-1761). During most of his tenure as MP for Dunbartonshire, he was Groom of the Bedchamber . Additionally, he served in the military during his periods in Parliament - he became Colonel of the 39th Regiment of Foot (1737-1738) and the 21st Regiment of Foot (1738-1752), serving with honour in the Battle of Dettingen in 1741.

He rose quickly up the ranks, becoming a brigadier in 1743, major general in 1744, and lieutenant general in 1747; he became colonel of the North British Dragoons in 1752, a position he held until his death. Upon the inheritance of his peerages (when his cousin died in 1761), he left the House of Commons and became Governor of Limerick and a member of the House of Lords for Scotland. He became a Privy Councillor in 1762, a general in 1765, and a Knight of the Order of the Thistle in that same year.