| St Joseph's Collegiate Institute | 1.0 |
Regular elementary or secondary | 9-12 | 776 | 16.3 | Roman Catholic |
| Buffalo Academy Of The Sacred Heart | 1.8 |
Regular elementary or secondary | 9-12 | 379 | 9.8 | Roman Catholic |
| Charles Grandison Finney High School | 2.2 |
Regular elementary or secondary | 9-12 | 33 | 7.3 | Christian (no specific denomination) |
| Buffalo Seminary | 2.6 |
Regular elementary or secondary | 9-12 | 174 | 7.0 | Nonsectarian |
| Canisius High School | 2.8 |
Regular elementary or secondary | 9-12 | 827 | 12.4 | Christian (no specific denomination) |
| Nardin Academy High School | 2.9 |
Regular elementary or secondary | 9-12 | 465 | 10.3 | Roman Catholic |
| Mount St Mary Academy | 3.3 |
Regular elementary or secondary | 9-12 | 392 | 11.3 | Roman Catholic |
| Cardinal O Hara High School | 3.8 |
Regular elementary or secondary | 9-12 | 245 | 9.9 | Roman Catholic |
| Bishop Timon-st Jude High School | 7.0 |
Regular elementary or secondary | 9-12 | 315 | 13.2 | Roman Catholic |
| Mount Mercy Academy | 7.2 |
Regular elementary or secondary | 9-12 | 387 | 11.2 | Roman Catholic |
| St Marys High School | 8.4 |
Regular elementary or secondary | 9-12 | 330 | 11.5 | Roman Catholic |
| Niagara Catholic High School | 12.1 |
Regular elementary or secondary | 9-12 | 172 | 11.0 | Roman Catholic |
| St Francis High School | 12.3 |
Regular elementary or secondary | 9-12 | 597 | 13.3 | Roman Catholic |
| Immaculata Academy | 13.3 |
Regular elementary or secondary | 9-12 | 224 | 9.2 | Roman Catholic |
| The Gow School | 21.0 |
Special education | 7-12 | 142 | 3.5 | Nonsectarian |
