Peter of Foix the Elder (Fr.: Pierre de Foix, le vieux) (1386 – 13 December 1464) was a French cardinal, created in 1409.
He was the son of Archambaud de Grailly, captal de Buch and Isabella, Countess of Foix.
He was a papal legate in Avignon (1433–1464) and Archbishop of Arles from 1450 to 1463.
He founded the Collège de Foix in Toulouse.