The Bishop of Winchester is the diocesan bishop of the Diocese of Winchester in the Church of England. The bishop's seat (cathedra) is at Winchester Cathedral in Hampshire.

The Bishop of Winchester has always held ex officio the office of Prelate of the Most Noble Order of the Garter since its foundation in 1348. except during the period of the Commonwealth until the Restoration of the Monarchy.^[2] Bishops of Winchester also often held the positions of Lord Treasurer and Lord Chancellor ex officio.

During the Middle Ages, the Diocese of Winchester was one of the wealthiest English sees, and its bishops have included a number of politically prominent Englishmen, notably the 9th century Saint Swithun and medieval magnates including William of Wykeham and Henry of Blois.

The Bishop of Winchester is appointed by the Crown, and is one of five Church of England bishops who sit ex officio among the 26 Lords Spiritual in the House of Lords, regardless of their length of service.^[3] Philip Mounstephen has been the Bishop of Winchester since 10 October 2023.^[4][5]

The Diocese of Winchester is one of the oldest and most important in England. Originally it was the episcopal see of the kingdom of Wessex or the West Saxons, with its cathedra at Dorchester Cathedral near Oxford under Saints Birinus and Agilbert. The cathedral at Dorchester was founded in AD 634 by Birinius, a Roman missionary. The see was transferred to Winchester in AD 660.

Winchester was divided in AD 909, with Wiltshire and Berkshire transferring to the new See of Ramsbury. Nevertheless, the domains of the Bishop of Winchester ran from the south coast to the south bank of the River Thames at Southwark, where the bishop had one of his palaces, making it one of the largest as well as one of the richest sees in the land. In more modern times, the former extent of the Diocese of Winchester was reduced by the formation of a new diocese of Southwark in south London,^{[lower-alpha 1]} a new diocese of Guildford in Surrey and a new diocese of Portsmouth in Hampshire. The most recent loss of territory was in 2022 when the Channel Islands were removed from the diocese of Winchester after a dispute with Bishop Tim Dakin led to a breakdown in relations. The Channel Islands were transferred to the Diocese of Salisbury by an Order in Council made under the Channel Islands Measure 2020.^[7]

Traditionally, in the general order of precedence before 1533, the Bishop of Winchester was given precedence over all other diocesan bishops - that is, the first English bishop in rank behind the archbishops of Canterbury and York. But in 1533, Henry VIII of England raised the rank of the Bishop of London and the Bishop of Durham, relegating Winchester to third (but still above other remaining diocesan bishops).^{[citation needed]} The order of precedence was implicitly recognised by the Bishoprics Act 1878.^{[8][lower-alpha 2]}

The Report of the Commissioners appointed by his Majesty to inquire into the Ecclesiastical Revenues of England and Wales (1835) found the Winchester see was the third wealthiest in England, after Canterbury and London, with an annual net income of £11,151.^[9]

The official residence of the Bishop of Winchester is Wolvesey Palace in Winchester. Historic homes of the bishops included Wolvesey Castle, Farnham Castle, Bishop's Waltham Palace and Winchester Palace in Southwark. The bishop is the visitor to five Oxford colleges, namely Magdalen College, New College, St John's College, Trinity College, and Corpus Christi College.

The former bishop of Winchester, Tim Dakin, was enthroned on 21 April 2012, having been elected on 14 October 2011. He was consecrated as a bishop at St Paul's Cathedral, London, on 25 January 2012. On 20 May 2021, it was reported that Dakin had "stepped back" as diocesan bishop for six weeks, in light of the threat of a diocesan synod motion of no confidence in his leadership. David Williams, Bishop of Basingstoke, also "stepped back" and Debbie Sellin, Bishop of Southampton, served as acting diocesan bishop.^[10] Dakin's leave was later extended to the end of August 2021.^[11] He retired on 6 February 2022.^[12]

Debbie Sellin continued as acting diocesan bishop during the vacancy, with retired bishop Richard Frith serving as the Archbishop's Episcopal Commissary in the diocese.^[13] In July 2023, it was announced that Philip Mounstephen would be the next Bishop of Winchester^[14] and that he was to leave his post at Truro in autumn 2023.^[15] Debbie Sellin remained acting diocesan bishop pending Mounstephen's election (which took place on 11 September)^[16] and confirmation on 10 October.^[17]

Among those who have served as assistant bishops of the diocese are:

• 1457–1486 (d.): William Westkarre, Prior of Mottisfont Abbey (1451–d.), titular Bishop of Sidon/Zeitun and Assistant Bishop of Canterbury (1480);^[31][32] sometime head of St Mary's College, Oxford (c. 1443); elected Prior of Holy Trinity Priory, Aldgate, 1445, but put aside; later a canon of Burscough Priory.^[33]
• 1885 – 1887 (res.): Francis Cramer-Roberts, Vicar of Milford-on-Sea and former Bishop of Nassau^[34]
• 1921–1922 (d.): James Macarthur, Archdeacon of the Isle of Wight (since 1906) and Assistant Bishop for the island; former Bishop of Southampton^[35]
• 1947 – 1962 (ret.): Leslie Lang, Archdeacon of Winchester and Canon Residentiary of Winchester Cathedral, and former Bishop of Woolwich^[36]
• 1963 – 1973 (ret.): Nigel Cornwall, Canon Residentiary of Winchester Cathedral and former Bishop of Borneo^[37]
• 1982 – 1990 (ret.): Hassan Dehqani-Tafti, former Bishop in Iran and President Bishop, Episcopal Church in Jerusalem and the Middle East^[38]
• 1996 – 2020 (d.) John Dennis (bishop) Honorary Assistant Bishop in the Diocese of Winchester and formerly Bishop of Knaresborough and Bishop of St Edmundsbury and Ipswich

• Deans of Winchester
• The Bishop of Winchester Academy