| Roll Number | 70640I |
| Local name of school | GRENNAN COLLEGE |
| School Level | POST PRIMARY |
| School Level Detail | VOCATIONAL |
| Principal's Name | SEAN OG O'SULLIVAN |
| Ethos | MULTI DENOMINATIONAL |
| Gender | MIXED |
| Language of Instruction | NO SUBJECTS TAUGHT THROUGH IRISH |
| DEIS Indicator | YES |
| Transition Year Indicator | YES |
| Enrolment Total | 320 |
| Enrolment Boys | 175 |
| Enrolment Girls | 145 |
| Free Education Indicator | YES |
| Fee Charging Indicator | NO |
| Day/Boarding | NA |
| Inspection Reports |
Reports |