| O'Hara educators | O'Hara educators and educationalists |
| O'Hara Academies | O'Hara commercial academies or schools |
| Elementary or Primary Schools | O'Hara elementary schools; O'Haras in elementary-school education |
| High or Secondary Schools | O'Hara high schools; O'Haras in high-school education |
| Colleges and Universities | O'Hara associations with colleges and universities |