James FitzGerald, 6th Earl of Desmond (died 1463), called 'the Usurper', was the youngest son of Gerald FitzGerald, 3rd Earl of Desmond, and Lady Eleanor, daughter of James Butler, 2nd Earl of Ormond.
Along with his son-in-law Thomas FitzGerald, 7th Earl of Kildare, James was a prominent Irish supporter of the House of York.
He was also godfather to George Plantagenet, 1st Duke of Clarence.
Dying in 1462 or 1463, Desmond is buried in Youghal.
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