Trinity Comprehensive School
Trinity Comprehensive School is a secondary school in Dublin. 564 pupils, Catholic ethos, 3 special classes, 1.42 applicants per place last year, DEIS Post-primary.
The facts
| Type | Secondary school |
|---|---|
| Gender | Mixed |
| Ethos | Catholic |
| Patron | Minister for Education |
| Fees | Free |
| Enrolment | 564 (282 boys, 282 girls) 2025/26 |
| Language of instruction | English Medium School |
| DEIS | Yes — Post-primary |
| Roll number | 81017A |
| Eircode | D09TN22 |
| Address | BALLYMUN ROAD, DUBLIN 9 |
Getting in
Competitive. 136 applications for 96 places in 2026/27 — 1.42 applicants per place.
| Places in the coming year | 96 |
|---|---|
| Places last year | 96 |
| Applications last year | 136 |
| Waiting list | 0 |
| Applications open | 01 October 2026 |
| Applications close | 22 October 2026 |
Ratio calculated against the previous year's places, as stated in the notice.
read from the school's Annual Admission Notice.
Read the school's Annual Admission Notice ↗ (2027/28)
Ireland has no catchment areas. A place depends on the school's own oversubscription criteria — siblings, feeder school, parish, distance, date of application — not on where you live. Read the admissions policy for those.
What DEIS means here
DEIS Post-primary. This is extra staffing, a Home School Community Liaison coordinator, School Completion Programme access, enhanced capitation, free State exam fees, and eligibility for the HEAR Scheme for reduced-points college entry.
Post-primary DEIS benefits: Free State examination fees for Junior Cycle and Leaving Certificate, Home School Community Liaison (HSCL) coordinator, School Completion Programme, and eligibility for the HEAR Scheme (Higher Education Access Route) offering reserved university places at reduced CAO points across Irish universities.
Worth knowing: several things people associate with DEIS are now available in every school. Schoolbooks are free at primary and post-primary regardless of DEIS status, and since 2025 all primary schools are eligible for the hot school meals programme. What remains specific to DEIS is the staffing — reduced class sizes in Urban Band 1, the Home School Community Liaison coordinator, School Completion Programme access and enhanced capitation.
Band as published in the Department's DEIS list, last revised 2022-10-12.
Special classes
3 special classes sanctioned for 26/27:
- 2 × Autism/Autistic Spectrum Disorders
- 1 × Autism Inclusion Class
2 of these are newly sanctioned for 26/27, up from 1 classes last year.
Source: National Council for Special Education. Children in a special class travel under a separate transport scheme with its own rules.
The area around this school
School planning area: Whitehall / Santry D9. This is how the Department plans where to build capacity. It is not a catchment.
Local house prices: the median residential sale price in Eircode district D09 (Dublin 9) was €492,000 in 2025. That is up 24.6% since 2020. CSO figures for the whole district, not the streets beside the school.
Area profile: the Pobal HP Deprivation Index rates Ballymun C at -15.85 (Disadvantaged), where 0 is the national average. 20% of adults there hold a third-level qualification.
Contact
| Principal | Frances Neary |
|---|---|
| Phone | 018428356 |
| info@trinitycomp.ie | |
| Local authority | Dublin City Council |
Other schools in Whitehall / Santry D9
- Bantiarna Na Mbuanna Boys Primary school, Dublin
- Bantiarna Na Mbuanna Girls Primary school, Dublin
- Clonturk College Secondary school, Dublin
- Gaelscoil Bhaile Munna Primary school, Dublin
- Holy Child National School Primary school, Dublin
- North Dublin Ns Project Primary school, Dublin
- Our Lady Of Victories Infant N S Primary school, Dublin
- S N Na Maighdine Muire B Primary school, Dublin
- Scoil An Leinbh Iosa Boys Seniors Primary school, Dublin
- Scoil Na Croi Naofa Primary school, Dublin
- St Ciarans Spec Sch Special school, DUBLIN 11
- St Kevins College Secondary school, Dublin
How we know
DoE Schools GIS 2026 (CC BY 4.0) — checked 2026-08-27.