St. Mary's National School
St. Mary's National School is a primary school in Dundrum. 242 pupils, Catholic ethos.
The facts
| Type | Primary school |
|---|---|
| Gender | Mixed |
| Ethos | Catholic |
| Patron | Archbishop of Dublin |
| Fees | Free |
| Enrolment | 242 (124 boys, 118 girls) 2025/26 |
| Language of instruction | English Medium School |
| Roll number | 02872U |
| Eircode | D18XV90 |
| Address | Lamb's Cross, Sandyford, Dublin 18 |
Special classes
The NCSE lists no special class at this school for the coming year.
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 D18 (Dublin 18) was €656,000 in 2025. That is up 31.3% 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 | Fergus Lyons |
|---|---|
| Phone | 012954173 |
| office@stmarysnssandyford.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.