Robert Burnell (d. 1292), English bishop and chancellor, was born at Acton Burnell in Shropshire, and began his public life probably as a clerk in the royal chancery. He was soon in the service of Edward, the eldest son of King Henry III., and was constantly in attendance on the prince, whose complete confidence he appears to have enjoyed. Having received some ecclesiastical preferments, he acted as one of the regents of the kingdom from the death of Henry III. in November 1272 until August 1274, when the new king, Edward I., returned from Palestine and made him his chancellor. In 1275 Burnell was elected bishop of Bath and Wells, and three years later Edward repeated the attempt which he had made in 1270 to secure the archbishopric of Canterbury for his favourite. The bishop's second failure to obtain this dignity was due, doubtless, to his irregular and unclerical manner of life, a fact which also accounts, in part at least, for the hostility which existed between his victorious rival, Archbishop Peckham, and himself.

As the chief adviser of Edward I. during the earlier part of his reign, and moreover as a trained and able lawyer, the bishop took a prominent part in the legislative acts of the "English Justinian," whose activity in this direction coincides practically with Burnell's tenure of the office of chancellor. The bishop also influenced the king's policy with regard to France, Scotland and Wales; was frequently employed on business of the highest moment; and was the royal mouthpiece on several important occasions. In 1283 a council, or, as it is sometimes called, a parliament, met in his house at Acton Burnell, and he was responsible for the settlement of the court of chancery in London. In spite of his numerous engagements, Burnell found time to aggrandize his bishopric, to provide liberally for his nephews and other kinsmen, and to pursue his cherished but futile aim of founding a great family. Licentious and avaricious, he amassed great wealth; and when he died on the 25th of October 1292 he left numerous estates in Shropshire, Worcestershire, Somerset, Kent, Surrey and elsewhere.

He was, however, genial and kind-hearted, a great lawyer and a faithful minister.

See R.W. Eyton, Antiquities of Shropshire (London, 1854-1860); and E. Foss, The Judges of England, vol. iii. (London, 1848-1864).