James Butler, 9th Earl of Ormond and 2nd Earl of Ossory (1496 – 28 October 1546), known as The Lame, was the son of Piers Butler, 8th Earl of Ormond and Margaret Fitzgerald, Countess of Ormond. He was created, in 1535, Viscount Thurles, and was confirmed by Act of Parliament, 6 November 1541, in the Earldom of Ormond, as 9th Earl with the pre-eminence of the original earls. His death by poisoning in London remains an unsolved mystery.