Eleanor de Clare (3 October 1292 – 30 June 1337) was the wife of the powerful Hugh Despenser the younger. She was born in 1292 at Caerphilly in Glamorgan, Wales. She was the eldest daughter of Gilbert de Clare, 6th Earl of Hertford and 7th Earl of Gloucester, and Joan of Acre, daughter of Edward I and Eleanor of Castile; thus she was a granddaughter to Edward I of England.