Elizabeth Scott, Duchess of Buccleuch (29 May 1743 – 21 November 1827), formerly Lady Elizabeth Montagu, was the wife of Henry Scott, 3rd Duke of Buccleuch.

Her maternal great-grandparents were John Churchill, 1st Duke of Marlborough and his wife Sarah.

They had seven children: Her Grace the Duchess of Buccleugh was a subscriber of the 1789 autobiography The Interesting Narrative of the Life of Olaudah Equiano[4] Her husband died in 1812 and her son became the Duke.

He had the Duchess Bridge at Langholme rebuilt in iron the following year.

The duchess died, aged 84, in Richmond, Surrey, and was buried at Warkton, Northamptonshire.