| Roll number | 72100J |
| Address | Mullinmore Street, Crossmolina, Ballina, Co. Mayo |
| Principal | Mr Conor O'Reilly |
| Website | www.tiernanscollege.ie |
| tiernanscollege@msletb.ie | |
| Phone | 09631236 |
| Ethos | Multi Denominational |
| Gender | Mixed |
| Enrolment total | 223 |
| Enrolment boys | 141 |
| Enrolment girls | 82 |