| Catholic Children's Aid Society of Hamilton, Catholic Children's Aid Society of Hamilton Adoption and Fostering Services | Hamilton |
| Catholic Women's League Holy Rosary Milton, Milton | Milton |
| Conseil scolaire catholique MonAvenir, Halton Locations, French Language Catholic Schools | Halton Region |
| Croatian Social and Cultural Centre | Halton Hills |
| Halton Catholic Children's Foundation | Burlington |
| Halton Catholic District School Board | Burlington |
| Holy Cross Roman Catholic Church | Georgetown |
| Holy Protection of the Blessed Virgin Mary Ukrainian Catholic Church (St. Mary's) | Burlington |
| Holy Rosary Catholic Church, Burlington | Burlington |
| Holy Rosary Church, Milton | Milton |
| Holy Trinity Croatian Catholic Parish | Oakville |
| Knights of Columbus, Acton - St Joseph Patron of Canada Council 8050 | Acton |
| Knights of Columbus, Georgetown | Georgetown |
| Knights of Columbus, Burlington - Msgr James Corbett Warren Memorial Council 5073 | Burlington |
| Knights of Columbus, Burlington - St Gabriel's Parish Council 10061 | Burlington |
| Knights of Columbus, Burlington - Saint Antoine Daniel Council 10340 | Burlington |
| Knights of Columbus, Burlington - Pope John Paul II Assembly 3176 | Burlington |
| Knights of Columbus, Burlington - Our Lady of the Most Holy Rosary 15920 | Burlington |
| Knights of Columbus, Milton - St Benedict of Nursia Council 16746 | Milton |
| Knights of Columbus, Milton - Holy Rosary Council 6777 | Milton |
| Knights of Columbus, Oakville - Mary Mother of God Council 14446 | Oakville |
| Mary Mother of God Parish | Oakville |
| Mater Boni Consilii Academy, Private Catholic Elementary School | Oakville |
| Paroisse Saint-Philippe, French Church Services | Burlington |
| Sacre-Coeur Church, Georgetown | Georgetown |
| St Andrew Catholic Church | Oakville |
| St Anthony of Padua Polish Roman Catholic Church | Oakville |
| St Benedict Church | Milton |
| St Dominic Roman Catholic Church | Oakville |
| St Gabriel Roman Catholic Church | Burlington |
| St James Roman Catholic Church | Oakville |
| St John the Baptist Roman Catholic Parish | Burlington |
| St Joseph Parish | Oakville |
| St Joseph Patron of Canada Roman Catholic Church, Acton - Church St E | Acton |
| St Joseph's Catholic Women's League, Acton - St Joseph Patron of Canada Catholic Church | Acton |
| St Joseph's Ukrainian Catholic Church | Oakville |
| St Matthew Roman Catholic Parish | Oakville |
| St Michael's Catholic Church | Oakville |
| St Patrick Roman Catholic Church | Burlington |
| St Paul the Apostle Roman Catholic Church | Burlington |
| St Raphael Roman Catholic Church | Burlington |
