St Tiernan's Community School
St Tiernan's Community School is a secondary school in Dundrum. 368 pupils, Inter-denominational ethos, 2 special classes, DEIS Post-primary.
The facts
| Type | Secondary school |
|---|---|
| Gender | Mixed |
| Ethos | Inter-denominational |
| Patron | Dublin & Dún Laoghaire ETB & Carmelite Order (Irish Province) |
| Fees | Free |
| Enrolment | 368 (213 boys, 155 girls) 2025/26 |
| Language of instruction | English Medium School |
| DEIS | Yes — Post-primary |
| Roll number | 91343T |
| Eircode | D16KW26 |
| Address | Parkvale, Balally, Dublin 16 |
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.
Feeder school links
Known feeder primary schools
Primary schools that publish a feeder or priority admission link to this school:
- St Mary's BNS, Rathfarnham Rathfarnham
Special classes
2 special classes sanctioned for 26/27:
- 2 × Autism/Autistic Spectrum Disorders
1 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: Ballinteer / Stepaside / DLR. 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 D16 (Dublin 16) was €643,000 in 2025. That is up 32.6% since 2020. CSO figures for the whole district, not the streets beside the school.
Area profile: the Pobal HP Deprivation Index rates Dundrum-sandyford at 7.63 (Marginally Above Average), where 0 is the national average. 65% of adults there hold a third-level qualification.
Contact
| Principal | Jenny Costello |
|---|---|
| Phone | 012953224 |
| runai@tiernans.ie | |
| Local authority | Dun Laoghaire Rathdown |
Other schools in Ballinteer / Stepaside / DLR
- Ballinteer Community School Secondary school, Ballinteer
- Ballinteer ETNS Primary school, Ballinteer
- Clochar Loreto N S Primary school, Rathfarnham
- Gaelcholáiste an Phiarsaigh Secondary school, Rathfarnham
- Gaelscoil Thaobh na Coille Primary school, Dundrum
- Gaelscoil na Fuinseoige Primary school, Churchtown
- Goatstown Stillorgan Primary School Primary school, Churchtown
- Holy Trinity NS, Leopardstown Primary school, Leopardstown
- Marley Grange Ns Primary school, Rathfarnham
- Na Maighdine Muire Girl Primary school, Dundrum
- Queen of Angels NS Primary school, Dundrum
- Rathfarnham Educate Together Primary school, Rathfarnham
How we know
DoE Schools GIS 2026 (CC BY 4.0) — checked 2026-08-27.