St Colmcille's NS, Knocklyon
St Colmcille's NS, Knocklyon is a primary school in Knocklyon. 744 pupils, Catholic ethos, 1.06 applicants per place last year.
The facts
| Type | Primary school |
|---|---|
| Gender | Mixed |
| Ethos | Catholic |
| Patron | Archbishop of Dublin |
| Fees | Free |
| Enrolment | 744 (389 boys, 355 girls) 2025/26 |
| Language of instruction | English Medium School |
| Roll number | 19742C |
| Eircode | D16W8K0 |
| Address | Idrone Avenue, Knocklyon, Dublin 16 |
Getting in
Competitive. 199 applications for 187 places in 2025/26 — 1.06 applicants per place, and 12 names went on the waiting list.
| Places in the coming year | 198 |
|---|---|
| Places last year | 187 |
| Applications last year | 199 |
| Waiting list | 12 |
Ratio calculated against the previous year's places, as stated in the notice.
The school received 187 applications in total across every class and every special class. The 199 above is the figure for this intake alone, which is the one that can be compared with the places offered for it.
read from the school's Annual Admission Notice.
Read the school's Annual Admission Notice ↗ (2026/27)
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.
Special classes
The NCSE lists no special class at this school for the coming year.
The area around this school
School planning area: Rathfarnham. 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 Firhouse-knocklyon at 5.46 (Marginally Above Average), where 0 is the national average. 55% of adults there hold a third-level qualification.
Contact
| Principal | Mary Cleary |
|---|---|
| Phone | 014942527 |
| mcleary@stcolmcilles.org | |
| Local authority | South Dublin County Council |
Other schools in Rathfarnham
- Ballyroan BNS Primary school, Rathfarnham
- Ballyroan GNS Primary school, Rathfarnham
- Coláiste Éanna Secondary school, Rathfarnham
- De La Salle College, Churchtown Secondary school, Churchtown
- Gaelscoil Chnoc Liamhna Primary school, Templeogue
- Loreto High School Secondary school, Rathfarnham
- Our Lady's Secondary School Secondary school, Templeogue
- Rathfarnham Parish N S Primary school, Knocklyon
- Rockbrook Park School Secondary school, Dublin
- S N Bhaile Eamonn Primary school, Dublin
- Sancta Maria College Secondary school, Rathfarnham
- Saplings Special School Special school, Leopardstown
How we know
DoE Schools GIS 2026 (CC BY 4.0) — checked 2026-08-27.