How many pupils go to SN San Treasa?

SN San Treasa has 430 pupils: 220 boys and 210 girls, according to the Department of Education's latest figures.

Is SN San Treasa a mixed school?

Yes. SN San Treasa takes both boys and girls.

What is the ethos of SN San Treasa?

SN San Treasa has a Catholic ethos. The ethos is set by the school's patron and shapes religious education and some admission rules.

Does SN San Treasa teach through Irish?

No. SN San Treasa teaches through English, with Irish taught as a subject.

Is SN San Treasa a DEIS school?

No. SN San Treasa is not part of the DEIS programme.

Where can I read SN San Treasa's inspection reports?

The Department of Education publishes school inspection reports on gov.ie. Search there by SN San Treasa's roll number, 18647D, or use the link on this page.

What other primary schools are near SN San Treasa?

The closest is Oatlands Primary School, An Edmund Rice School. The table on this page compares the nearest schools by distance, size, ethos and language.

SN San Treasa

Mount Merrion, Co. Dublin

430 pupilsMixedCatholic

Work-to-rule: no supervision before or after school while it lasts. Check with the school. What it means

At a glance

SN San Treasa is a primary school in Mount Merrion, Co. Dublin (Eircode A94 EK75). Frances Mullin is the principal of SN San Treasa, according to the Department of Education's 2025/26 schools list.

Pupils: 430
Boys and girls: Mixed · 220 boys, 210 girls
Ethos: Catholic
Language: English-medium
DEIS: No
Type: Mainstream
Roll number: 18647D

Inspection reports for this school from the Department of Education, on gov.ie

Compare with another school

Explained: school ethos · how admissions work · how to choose a school

Starting junior infants in September 2027

We haven't found SN San Treasa's junior infant enrolment dates for September 2027 yet. Most primary schools take applications in the autumn and winter before; the school's admission notice has the exact window.

We check school websites every week and add dates as soon as they're published.

When can my child start school? · How admissions work

Questions parents ask

Where is SN San Treasa?: SN San Treasa is a primary school in Mount Merrion, Co. Dublin (Eircode A94 EK75).
Who is the principal of SN San Treasa?: Frances Mullin is the principal of SN San Treasa, according to the Department of Education's 2025/26 schools list.
How many pupils go to SN San Treasa?: SN San Treasa has 430 pupils: 220 boys and 210 girls, according to the Department of Education's latest figures.
Is SN San Treasa a mixed school?: Yes. SN San Treasa takes both boys and girls.
What is the ethos of SN San Treasa?: SN San Treasa has a Catholic ethos. The ethos is set by the school's patron and shapes religious education and some admission rules.
Does SN San Treasa teach through Irish?: No. SN San Treasa teaches through English, with Irish taught as a subject.
Is SN San Treasa a DEIS school?: No. SN San Treasa is not part of the DEIS programme.
Where can I read SN San Treasa's inspection reports?: The Department of Education publishes school inspection reports on gov.ie. Search there by SN San Treasa's roll number, 18647D, or use the link on this page.
What other primary schools are near SN San Treasa?: The closest is Oatlands Primary School, An Edmund Rice School. The table on this page compares the nearest schools by distance, size, ethos and language.

Closest schools

SN San Treasa compared with other schools in the area
School	Distance	Pupils	Boys and girls	Ethos	Irish-medium	DEIS
SN San TreasaThis school		430	Mixed	Catholic	No	No
Oatlands Primary School, An Edmund Rice SchoolBlackrock	500 m	428	Mixed	Catholic	No	No
Gaelscoil LaigheanDublin 14	700 m	130	Mixed	Multi-denominational	Yes	No
SN Naomh LorcanStillorgan	700 m	390	Boys	Catholic	No	No
SN Cnoc AinbhilStillorgan	800 m	434	Girls	Catholic	No	No
Our Lady of Mercy Convent SchoolBooterstown	1.3 km	247	Girls	Catholic	No	No
St Brigids NSStillorgan	1.4 km	100	Mixed	Church of Ireland	No	No

Straight-line distances. Compare with the two closest · See more schools near here.

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Contact

The Rise
Mount Merrion
Co. Dublin
A94EK75

Principal: Frances Mullin on the Department of Education's 2025/26 schools list
Phone: 01 288 1505
Email: [email protected]
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Secondary schools near here

For 5th and 6th class families: open nights, application dates and costs for the secondary schools closest to SN San Treasa, on our sister site.

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Next school holidays

In 9 daysOctober mid-term breakMon, 26 October to Fri 30 October 2026
In 10 weeksChristmas holidaysWed 23 December 2026 to Tue 5 January 2027
In 18 weeksFebruary mid-term breakThu, 18 February to Fri 19 February 2027

These dates are set for every primary school in Ireland. Check with SN San Treasa for any extra days off and the last day in June. Get reminders · All term dates · Add to Google Calendar