Robert King (died 1558) was an English churchman who became the first Bishop of Oxford.

Robert King was a Cistercian monk, of Thame Park Abbey, and the last Abbot there, a position he obtained perhaps[1] through the influence of the Bishop of Lincoln, John Longland, as whose prebendary and suffragan bishop he had acted from 1535:[2] he was appointed suffragan bishop in Lincoln on 7 January 1527,[3] and ordained and consecrated to the titular See of Rheon, Greece (Reonesis) on 13 May.

Both Thame Park and Oseney were dissolved in 1539, as part of the Dissolution of the Monasteries under Henry VIII.

[8] The buildings of the old Gloucester College, Oxford, which had become in 1542 the bishop's palace,[9] were under Edward VI taken back by the Crown.

King lived in what is now called the Old Palace (rebuilt in the seventeenth century), and Littlemore Hall.