Washington Sewallis Shirley, 9th Earl Ferrers (3 January 1822 – 13 March 1859), styled Hon. Washington Shirley from 1827 to 1830 and Viscount Tamworth from 1830 to 1842, was a British nobleman. The elder son of Robert William Shirley, Viscount Tamworth, he succeeded his father as heir apparent in 1830. Tamworth, as he then was, was educated at Eton College and succeeded his grandfather, Washington, in the earldom in 1842. On 23 July 1844, he married Augusta Annabella Chichester, daughter of Lord Edward Chichester (later Marquess of Donegall), at St George's, Hanover Square. They had five children: