Robert de Vere, 5th Earl of Oxford (c. 1220 – 1296) was the son and heir of Hugh de Vere, 4th Earl of Oxford, and chamberlain to Queen Eleanor.

[1] Robert de Vere's marriage brought into his family the role of chamberlain to Henry III's queen Eleanor.

De Vere's title and property were forfeited, but restored shortly afterwards by the Dictum of Kenilworth.

They had six sons and two daughters:[3] Robert de Vere died before 7 September 1296.

[4] The heart of Robert de Vere was buried separately at the Ipswich Greyfriars, which was the burial place of Margaret Mortimer, wife of the 6th Earl.