Parishes, clergy, staff, and ministries across the diocese. Search or filter to narrow the roster.
Compiled from public records
These parish, clergy, staff, and ministry listings are compiled from diocesan and parish websites, and may lag behind recent changes.
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| Name | City | Type | Phone | Status | Founded | Languages |
|---|---|---|---|---|---|---|
| Cathedral of St. Catherine of Alexandria | St. Catharines | Parish | (905) 684-3964 | Active | 1832 | |
| Our Lady of Hungary Parish | Welland | Parish | (905) 734-3772 | Active | Hungarian | |
| Our Lady of Peace Parish | Niagara Falls | Parish | (905) 358-3791 | Active | ||
| Our Lady of Perpetual Help Parish (Polish) | St. Catharines | Parish | (905) 937-4230 | Active | Polish | |
| Our Lady of the Holy Rosary Parish | Thorold | Parish | (905) 227-3178 | Active | 1852 | |
| Our Lady of the Scapular Parish | Niagara Falls | Parish | (905) 358-7611 | Active | 1951 | |
| Paroisse Immaculee-Conception (en francais) | St. Catharines | Parish | (905) 934-4266 | Active | 1924 | French |
| Paroisse Sacre-Coeur (en francais) | Welland | Parish | (905) 735-5823 | Active | 1920 | French |
| Paroisse Saint-Antoine-de-Padoue (en francais) | Niagara Falls | Parish | (905) 358-5549 | Active | 1955 | French |
| Paroisse Saint-Jean-de-Brebeuf | Port Colborne | Parish | (905) 835-0202 | Active | 1951 | French |
| Sacred Heart Parish | Niagara Falls | Parish | (905) 295-4455 | Active | ||
| St. Alexander Parish | Fonthill | Parish | (905) 892-3090 | Active | 1957 | |
| St. Alfred Parish | St. Catharines | Parish | (905) 934-9703 | Active | 1951 | |
| St. Aloysius Parish, Latin Mass Apostolate | Thorold | Parish | (905) 684-0154 | Active | Latin | |
| St. Andrew the Apostle Parish | Welland | Parish | (905) 732-5046 | Active | 1957 | |
| St. Ann Parish, Fenwick | Fenwick | Parish | (905) 892-6123 | Active | ||
| St. Ann Parish, Niagara Falls | Niagara Falls | Parish | (905) 358-9333 | Active | 1913 | |
| St. Anthony Parish (Croatian) | Welland | Parish | (905) 732-3839 | Active | Croatian | |
| St. Denis Parish | St. Catharines | Parish | (905) 685-5911 | Active | 1947 | |
| St. Elizabeth Parish | Wainfleet | Parish | (905) 899-1699 | Active | ||
| St. George Parish | Crystal Beach | Parish | (905) 894-2853 | Active | 1947 | |
| St. Helen Parish | Beamsville | Parish | (905) 562-7427 | Active | 1986 | |
| St. John Bosco Parish | Port Colborne | Parish | (905) 835-5418 | Active | ||
| St. Joseph Parish, Grimsby | Grimsby | Parish | (905) 945-2661 | Active | 1866 | |
| St. Joseph Parish, Snyder | Stevensville | Parish | (905) 295-4455 | Active | ||
| St. Julia Parish | St. Catharines | Parish | (905) 684-5603 | Active | 1967 | |
| St. Kevin Parish | Welland | Parish | (905) 735-5885 | Active | 1951 | |
| St. Martin of Tours Parish | Smithville | Parish | (289) 956-0221 | Active | ||
| St. Mary of the Assumption Parish | St. Catharines | Parish | (905) 682-3843 | Active | 1867 | |
| St. Mary Parish, Welland | Welland | Parish | (905) 734-3143 | Active | 1910 | |
| St. Mary/St. Ann Parish | Hagersville | Parish | (905) 768-5726 | Active | 1914 | |
| St. Michael Parish, Fort Erie | Fort Erie | Parish | (905) 871-0692 | Active | ||
| St. Michael the Archangel Parish, Dunnville | Dunnville | Parish | (905) 774-6972 | Active | 1886 | |
| St. Patrick Parish, Caledonia | Caledonia | Parish | (905) 765-2729 | Active | 1856 | |
| St. Patrick Parish, Niagara Falls | Niagara Falls | Parish | (905) 354-7451 | Active | 1858 | |
| St. Patrick Parish, Port Colborne | Port Colborne | Parish | (905) 834-6426 | Active | 1859 | |
| St. Patrick Parish, St. Catharines | St. Catharines | Parish | (905) 227-2358 | Active | ||
| St. Stephen Parish | Cayuga | Parish | (905) 772-5314 | Active | ||
| St. Therese of Lisieux Parish | Port Colborne | Parish | (905) 834-4645 | Active | 1937 | |
| St. Thomas Aquinas Parish | St. Catharines | Parish | (905) 687-6971 | Active | 1961 | |
| St. Thomas More Parish | Niagara Falls | Parish | (905) 356-7533 | Active | 1956 | |
| St. Vincent de Paul Parish | Niagara-on-the-Lake | Parish | (905) 468-7272 | Active | 1827 | |
| Star of the Sea Parish | St. Catharines | Parish | (905) 934-1170 | Active | 1918 | |
| Sts. Peter & Paul Parish | Welland | Parish | (905) 734-4824 | Active |