Aubrey de Vere, 1st Earl of Oxford (c. 1115 – 26 December 1194) was an English noble involved in the succession conflict between King Stephen and Empress Matilda in the mid-twelfth century.

Aubrey de Vere succeeded as Lord Great Chamberlain on 15 May 1141, after his father had been slain by a mob in London[2] during the civil war between King Stephen and the Empress Matilda.

The latter charter provided that Aubrey de Vere would be Earl of Cambridgeshire, with the third penny, unless that county was held by the King of Scots, in which case he was to have a choice of four other titles.

At some time between 1144 and 1146, the Constable of Bourbourg arranged a divorce for his daughter Countess Beatrice with Earl Aubrey's consent, after which Oxford ceased to be Count of Guînes.

By 1165 he attempted to have the marriage annulled, allegedly because Agnes had been betrothed to his brother, Geoffrey de Vere, but probably in reality because her father had been disgraced and ruined.

Oxford reportedly 'kept his wife shut up and did not allow her to attend church or go out, and refused to cohabit with her', according to the letter the bishop of London wrote to the Pope about the case when the young countess appealed to the Roman Curia.

[7] Oxford served during the civil war of 1173–4, helping to repel a force under Robert de Beaumont, 3rd Earl of Leicester, which landed in Suffolk on 29 September 1173.