Gertrude Russell, Duchess of Bedford (15 February 1715 – 1 July 1794), formerly the Hon. Gertrude Leveson-Gower, was the second wife of John Russell, 4th Duke of Bedford. She was the eldest daughter of John Leveson-Gower, 1st Earl Gower, and his wife, the former Lady Evelyn Pierrepont. She married the Duke of Bedford on 2 April 1737. The earl's first wife, the former Lady Diana Spencer, had died in 1735, of tuberculosis; Diana's only child by the earl - John Russell, Marquess of Tavistock - had died in infancy.