|Bishop of Winchester|
|Appointed||1 December 1333|
|Term ended||18 July 1345|
|Predecessor||John de Stratford|
|Consecration||22 May 1317|
|Died||18 July 1345|
Bishop of Hereford|
Bishop of Worcester
Orleton was born into a Herefordshire family, possibly in Orleton, possibly in Hereford. The lord of the manor was Roger Mortimer, to whose interests Orleton was loyal. His nephews were John Trilleck, Bishop of Hereford and Thomas Trilleck, Bishop of Rochester.
From the accession of Edward II Orleton was employed as a diplomat to the papal court, at Avignon from 1309, of Clement V and John XXII. A favourite of the latter, Orleton was nominated bishop of Hereford by the pope on 15 May 1317, and consecrated on 22 May 1317, despite the protests of the king. During his episcopate the great central tower at Hereford, a wonder of its day, was built, but there is no reason to think him responsible for a matter under the jurisdiction of the dean and chapter. Despite his increasing political involvement with Queen Isabella and Roger Mortimer against Edward II, playing a significant role in the events of 1326, Orleton was an effective bishop in Hereford diocese, and reformed the scandalous Wigmore Abbey and also the priory at Abergavenny and St. Guthlac's priory in Hereford.
British historian Ian Mortimer has recently argued that Orleton's sodomy accusations against Edward II in 1326-1327 may have been false, and that they may have been related to contemporary smear campaigns against one's political adversaries, such as previous similar aspersions cast against Pope Boniface VIII by Guillaume de Nogaret, Chancellor to King Philip IV of France, as well as those involved in dispossession of the Knights Templar, during which Orleton was a primary antagonist of the order 
One assessment stated that:
Bishop Adam, wary, unscrupulous, but at the same time vigorous and of unusual ability, played a great part in politics to the end of the wretched King's life. Some historians still believe that he recommended the murder; he certainly supported the deposition in Parliament, and went to Kenilworth as one of the commissioners to force the King's resignation. If thus interested in secular politics, he was no less watchful and vigilant in the affairs of his bishopric and the cathedral.
Orleton died on 18 July 1345.
Orleton is a supporting character in Les Rois maudits (The Accursed Kings), a series of French historical novels by Maurice Druon. He was portrayed by Jean Lanier in the 1972 French miniseries adaptation of the series, and by Serge Maillat in the 2005 adaptation.
- Or Adam of Orlton, Adam de Orlton, Adam de Orleton
- Register of Adam Orleton, ed A T Bannister, 1907
- "Canterbury and York Series Vol. VIII". Retrieved 2012-01-27.
- Bannister, op. cit, introduction
- Fryde, et al. Handbook of British Chronology p 250
- McKisack The Fourteenth Century pp. 85–91
- Bannister, op.cit.
- Fryde, et al. Handbook of British Chronology p. 279
- Fryde, et al. Handbook of British Chronology p. 277
- Ian Mortimer: "Barriers to the Truth" History Today: 60-12: (December 2010): 13
- Gutenberg text Archived 22 October 2007 at the Wayback Machine.
- Fryde, et al. Handbook of British Chronology p. 105
- Fryde, E. B.; Greenway, D. E.; Porter, S.; Roy, I. (1996). Handbook of British Chronology (Third revised ed.). Cambridge: Cambridge University Press. ISBN 0-521-56350-X.
- Haines, Roy Marti The Church and Politics in Fourteenth-Century England: The Career of Adam Orleton c. 1275–1345 1978
- McKisack, May, The Fourteenth Century
- Lundy, Darryl. "The Peerage.com: Edward III". The Peerage. Retrieved 31 August 2007.[unreliable source]
- Weir, Alison Isabella: She-Wolf of France, Queen of England 2005
John de Stratford
| Lord High Treasurer
|Catholic Church titles|
| Bishop of Hereford
| Bishop of Worcester
John de Stratford
| Bishop of Winchester