Elizabeth de Vere (died 14 or 16 August 1375) was the daughter of John de Vere, 7th Earl of Oxford and Maud de Badlesmere, and the wife of Sir Hugh Courtenay (died c. 1348), then John de Mowbray, 3rd Baron Mowbray, and then Sir William de Cossington. Before 3 September 1341 she married Sir Hugh Courtenay (died c. 1348), the eldest son of Hugh Courtenay, 10th Earl of Devon (12 July 1303 – 2 May 1377), and Margaret de Bohun (d. 16 December 1391), daughter of Humphrey Bohun, Earl of Hereford and Essex (c.1276 – 16 March 1322), by Elizabeth (d. 5 May 1316), the daughter of King Edward I.