The Diocese of Wellington is one of the thirteen dioceses and hui amorangi (Māori bishoprics) of the Anglican Church in Aotearoa, New Zealand and Polynesia.^[1] The diocese covers the area between the bottom of the North Island of New Zealand up to the area of Mount Ruapehu.

The seat of the Bishop of Wellington is at the Wellington Cathedral of St Paul. The current Bishop of Wellington, since 2012, has been Justin Duckworth, joined by newly elected Assistant Bishop Anashuya Fletcher (2024).

There are approximately 60 parishes and mission districts within the diocese of Wellington.

The diocese's first bishop, Charles Abraham, was consecrated in 1858. An attempt was made in the 21st General Synod (1919) to make the Bishop of Wellington ex officio Primate and Metropolitan;^[2] this failed in the 22nd Synod (1922).^[3]

The Archbishop David Moxon announced on 29 April 2012 that Justin Duckworth was elected as the 11th Bishop of Wellington. Duckworth was installed on 30 June 2012.

The diocese celebrated its sesquicentenary in 2008; the celebrations included pilgrimages throughout the diocese.

Old St Paul's, the second Church of St Paul in Wellington, was the pro-cathedral church for the Anglican Diocese of Wellington from 1866 to 1964 and remains consecrated, despite now owned by Heritage New Zealand (formerly the New Zealand Historic Places Trust). The first parish church for the early settlers, dedicated to St Paul, was behind where the Beehive stands today: a replica stands at the Bolton Street entrance to an early cemetery for Wellington, alongside the original sextons cottage. The current Wellington Cathedral church for the Diocese was dedicated, partially completed, in the name of St Paul in 1964. Completion was in stages and in 2001 it was consecrated.

The following individuals have served as the Bishop of Wellington, or any precursor title:

• E. J. Rich
• 1991–1998 Tom Brown
• 23 February 1991 – 1999: Brian Carrell, Bishop in Palmerston North^[4]
• 1997–?: Hāpai Winiata^[5]
• 2 June 2017 – 2022: Eleanor Sanderson^[4]<Bishop of Hull>

• 2024–present: Anashuya Fletcher^[6]

The Wellington Diocese today is divided into seven archdeaconries: Wanganui, Manawatu, Kapiti, Wairarapa, Belmont, Ohariu, and Wellington. In 1866, there was one archdeaconry: O. Hadfield was Archdeacon of Kapiti.^[7] In 1887, Arthur Stock had been Archdeacon of Kapiti since 1870.^[8] In 1909, Charles Coleridge Harper (a grandson of bishop Henry Harper) was Archdeacon of Wanganui.