John Oliver (died 1552) was an English churchman, canon lawyer, courtier and Dean of Christ Church, Oxford.
On 22 February 1529 he was sent to Shaftesbury Abbey to take the fealty of Elizabeth Zouche, the new abbess; and at the end of the same year he became prebendary of Southwell.
On 4 May 1533 Oliver was made dean of Christ Church, Oxford, in succession to John Hygdon He attended to other affairs, however, and in 1533 formed one of the court which declared Queen Catherine of Aragon contumacious.
In 1540 he was consulted by convocation as to the validity of the king's marriage with Anne of Cleves; and other similar public duties were confided to him.
He took part in Stephen Gardiner's trial at the close of 1550, was a commissioner for the suppression of the Anabaptists in Kent and Essex in 1551, and the same year accompanied the embassy to France to treat of the king Edward VI's possible marriage.