| Bishop (2010.09.14 – ...): |  Bishop Gerard Paul Bergie (66) |
Cities (Ontario)  | Churches (50) |
| Beamsville |  St. Helen  |
| Caledonia | St. Patrick |
| Cayuga | St. Stephen |
| Crystal Beach | St. George |
| Dunnville | St. Michael |
| Fenwick | St. Ann |
| Fonthill | St. Alexander |
| Fort Erie | St. Michael |
| Grimsby | St. Joseph |
| Hagersville | Our Lady of Lourdes |
| Lincoln |  St. Helen |
| Niagara Falls |  Our Lady of Peace (Shrine) |
| Niagara Falls | Our Lady of the Scapular |
| Niagara Falls | Sacred Heart |
| Niagara Falls | St. Ann |
| Niagara Falls | Saint-Antonie-de-Padoue (French) Church of St. Anthony of Padua |
| Niagara Falls | St. Patrick |
| Niagara Falls | St. Therese (Monastery) Monastery of Mount Carmel |
| Niagara Falls | St. Thomas More |
| Niagara-on-the-Lake | St. Vincent de Paul |
| Port Colborne | Our Lady of the Holy Rosary (Shrine) |
| Port Colborne | Saint-Jean-de-Brébeuf (French) Church of St. John Brébeuf |
| Port Colborne | St. John Bosco |
| Port Colborne | St. Patrick |
| Port Colborne | St. Therese of Lisieux |
| St. Catharines |  St. Catherine of Alexandria (Cathedral) |
| St. Catharines | Immaculée-Conception (French) Church of the Immaculate Conception |
| St. Catharines | Our Lady of Perpetual Help (Polish) |
| St. Catharines |  Queen of Angels |
| St. Catharines | St. Alfred |
| St. Catharines | St. Denis |
| St. Catharines | St. Julia |
| St. Catharines | St. Mary of the Assumption |
| St. Catharines | St. Patrick |
| St. Catharines | St. Thomas Aquinas |
| St. Catharines | Star of the Sea |
| Smithville | St. Martin of Tours |
| Snyder | St. Joseph |
| Thorold | Our Lady of the Holy Rosary |
| Thorold South | St. Aloysius (Latin) |
| Thorold South | St. Padre Pio (Shrine) |
| Wainfleet | St. Elizabeth |
| Walpole | St. Ann |
| Welland | Our Lady of Hungary (Hungarian) |
| Welland | Sacré-Coeur (French) Church of the Sacred Heart |
| Welland | St. Andrew the Apostle |
| Welland | St. Anthony (Croatian) |
| Welland | St. Kevin |
| Welland | St. Mary |
| Welland | Sts. Peter and Paul |
| Cities | Other Churches Within the Diocesan Territory (7) |
| Beamsville |  St. Michael the Archangel (Parish) (Ukrainian) |
| Grimsby | Holy Dormition of the Mother of God (Ukrainian) |
| Niagara Falls | Nativity of the Mother of God (Parish) (Ukrainian) |
| St. Catharines | Sts. Cyril and Methodius (Parish) (Ukrainian) |
| St. Catharines | St. John the Theologian (Parish) (Ukrainian) |
| Welland | St. John the Baptist (Parish) (Hungarian) (Hungarian) |
| Welland | St. Michael the Archangel (Parish) (Ukrainian) |
Last updated on 2025.10.28
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