John Dalrymple, 6th Earl of Stair (1749–1821) was a Scottish peer, soldier and diplomat.
The eldest son of John Dalrymple, 5th Earl of Stair, and his wife, a daughter of George Middleton, banker of London, was born 24 September 1749.
As captain of the 87th Foot he served in the American War of Independence, taking part in the successful attack on New London, Connecticut under Benedict Arnold as his aide.
[1] On 5 January 1782 Dalrymple was appointed minister plenipotentiary to Poland, and from 5 August 1785 until 1788 was minister plenipotentiary to Berlin.
[1] He was succeeded by his cousin John Dalrymple, 7th Earl of Stair whose father was William Dalrymple, brother of the 5th Earl of Stair John Dalrymple, 5th Earl of Stair.