| Jurisdiction: | Diocese |
| Pyay | |
| Latin: | Dioecesis Pyayensis |
| Country: | Myanmar |
| Province: | Yangon |
| Metropolitan: | Yangon |
| Area Km2: | 80,906 |
| Population: | 9,028,000 |
| Population As Of: | 2004 |
| Catholics: | 24,300 |
| Catholics Percent: | 0.3 |
| Denomination: | Roman Catholic |
| Sui Iuris Church: | Latin Church |
| Established: | 9 July 1940 (As Prefecture Apostolic of Akyab) 19 September 1957 (As Prefecture Apostolic of Prome) 21 February 1961 (As Diocese of Prome) 8 October 1991 (As Diocese of Pyay) |
| Cathedral: | St Paul’s Cathedral in Pyay |
| Bishop: | Alexander Pyone Cho |
| Metro Archbishop: | Charles Maung Bo |
| Suffragan: | for one --> |
| Archdeacon: | for one--> |
| Emeritus Bishops: | Joseph Devellerez Thaung Shwe Bishop Emeritus (1976-2010) Gregory Taik Maung Auxiliary Bishop Emeritus (1985-2010) |
The Roman Catholic Diocese of Pyay (Lat: Diocesis Pyayensis) is a suffragan diocese of the Latin Church of the Roman Catholic Church in Burma, in the ecclesiastical province of the Metropolitan Roman Catholic Archdiocese of Yangon (Rangoon), but like that depends on the missionary Roman Congregation for the Evangelization of Peoples.
Its Cathedral episcopal see is St. Paul’s Cathedral, in Pyay, Bago Region.
As per 2014, it pastorally served 25,810 Catholics (0.3% of 9,889,000 total) on 80,938 km² in 20 parishes and 1 mission with 40 priests (39 diocesan, 1 religious), 110 lay religious (5 brothers, 105 sisters) and 13 seminarians.
Originally erected on 9 July 1940 as the Apostolic prefecture of Akyab, the pre-diocese has the distinction of being the only ecclesiastical jurisdiction in Burma created from the Diocese of Chittagong (in Bengal, now Metropolitan; by La Salette Fathers (M.S.) mission).
On 19 September 1957, its name was changed to the Apostolic prefecture of Prome.
On 21 February 1961, the prefecture was elevated to a full bishopric as Diocese of Prome.
Finally on 8 October 1991, the diocese was renamed the Diocese of Pyay and became a suffragan of the Archdiocese of Yangon
The resignation for health reasons of Auxiliary Bishop Gregory Taik Maung, appointed in 1991, who was serving as Apostolic Administrator, was accepted by Pope Benedict XVI on Friday, July 16, 2010. On Friday, December 3, 2010, Pope Benedict XVI accepted the resignation of Bishop Joseph Devellerez Thaung Shwe as Bishop and appointed Burmese priest Alexander Pyone Cho, a native of the Pyay Diocese (on loan "fidei donum" to the Roman Catholic Diocese of Salina, Kansas, USA), as Bishop of Pyay.
(all Roman Rite, till 2010 foreign members of a Latin missionary congregation)