| Jurisdiction: | Diocese |
| Saint-Jérôme | |
| Latin: | Dioecesis Sancti Hieronymi Terraebonae |
| Image Alt: | St. Jerome's Cathedral |
| Country: | Canada |
| Province: | Archdiocese of Montreal |
| Population: | 469,095[1] |
| Catholics: | 455,952 |
| Catholics Percent: | 97.2 |
| Parishes: | 35 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Established: | 23 June 1951 |
| Cathedral: | St. Jerome's Cathedral, Saint-Jérôme |
| Priests: | 74 |
| Bishop: | Raymond Poisson |
| Emeritus Bishops: | Pierre Morissette Gilles Cazabon, O.M.I. Donald Lapointe |
| Website: | diocesestj.ca |
The Roman Catholic Diocese of Saint-Jérôme (Latin: Dioecesis Sancti Hieronymi Terraebonae) is a Latin rite suffragan of the Archdiocese of Montréal.
Its cathedral episcopal see is Cathédrale Saint-Jérôme, dedicated to Saint Jerome (Hieronumus), in Saint-Jérôme, Quebec.
It was erected on 23 June 1951 as Diocese of Saint-Jérôme (Latin: Sancti Hieronymi Terræbonæ), on territories split off from (its Metropolitan) the Archdiocese of Montréal, the Archdiocese of Ottawa and the Diocese of Mont-Laurier.
On 1 June 2022, the Diocese of Saint-Jérôme and the Diocese of Mont-Laurier were united to become the Diocese of Saint-Jérôme–Mont-Laurier.
As per 2014, it pastorally served 446,000 Catholics (97.2% of 459,000 total) on 2,116 km2 in 35 parishes, 67 priests (52 diocesan, 15 religious), 18 deacons, 118 lay religious (21 brothers, 97 sisters), 3 seminarians.
(Roman Rite)