How many pupils go to St Marys Sen NS?

St Marys Sen NS has 204 pupils: 108 boys and 96 girls, according to the Department of Education's latest figures.

Is St Marys Sen NS a mixed school?

Yes. St Marys Sen NS takes both boys and girls.

What is the ethos of St Marys Sen NS?

St Marys Sen NS has a Catholic ethos. The ethos is set by the school's patron and shapes religious education and some admission rules.

Does St Marys Sen NS teach through Irish?

No. St Marys Sen NS teaches through English, with Irish taught as a subject.

Is St Marys Sen NS a DEIS school?

Yes. St Marys Sen NS is part of the DEIS programme, which gives extra support to schools in disadvantaged areas.

Where can I read St Marys Sen NS's inspection reports?

The Department of Education publishes school inspection reports on gov.ie. Search there by St Marys Sen NS's roll number, 19647I, or use the link on this page.

What other primary schools are near St Marys Sen NS?

The closest is St Marys Junior NS. The table on this page compares the nearest schools by distance, size, ethos and language.

St Marys Sen NS

Dublin 22, Co. Dublin

204 pupilsMixedCatholicDEIS

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

At a glance

St Marys Sen NS is a primary school in Dublin 22, Co. Dublin (Eircode D22 WN40). Aileen Twomey is the principal of St Marys Sen NS, according to the Department of Education's 2025/26 schools list.

Pupils: 204
Boys and girls: Mixed · 108 boys, 96 girls
Ethos: Catholic
Language: English-medium
DEIS: Yes, part of the DEIS programme
Type: Mainstream
Roll number: 19647I

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

Compare with another school

Explained: what DEIS means · school ethos · how admissions work · how to choose a school

Starting junior infants in September 2027

We haven't found St Marys Sen NS'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 St Marys Sen NS?: St Marys Sen NS is a primary school in Dublin 22, Co. Dublin (Eircode D22 WN40).
Who is the principal of St Marys Sen NS?: Aileen Twomey is the principal of St Marys Sen NS, according to the Department of Education's 2025/26 schools list.
How many pupils go to St Marys Sen NS?: St Marys Sen NS has 204 pupils: 108 boys and 96 girls, according to the Department of Education's latest figures.
Is St Marys Sen NS a mixed school?: Yes. St Marys Sen NS takes both boys and girls.
What is the ethos of St Marys Sen NS?: St Marys Sen NS has a Catholic ethos. The ethos is set by the school's patron and shapes religious education and some admission rules.
Does St Marys Sen NS teach through Irish?: No. St Marys Sen NS teaches through English, with Irish taught as a subject.
Is St Marys Sen NS a DEIS school?: Yes. St Marys Sen NS is part of the DEIS programme, which gives extra support to schools in disadvantaged areas.
Where can I read St Marys Sen NS's inspection reports?: The Department of Education publishes school inspection reports on gov.ie. Search there by St Marys Sen NS's roll number, 19647I, or use the link on this page.
What other primary schools are near St Marys Sen NS?: The closest is St Marys Junior NS. The table on this page compares the nearest schools by distance, size, ethos and language.

Closest schools

St Marys Sen NS compared with other schools in the area
School	Distance	Pupils	Boys and girls	Ethos	Irish-medium	DEIS
St Marys Sen NSThis school		204	Mixed	Catholic	No	Yes
St Marys Junior NSDublin 22	100 m	183	Mixed	Catholic	No	Yes
Neillstown NSDublin 22	700 m	231	Mixed	Catholic	No	Yes
St Bernadettes Junior NSDublin 22	800 m	173	Mixed	Catholic	No	Yes
St Peter Apostle Sen NSDublin 22	800 m	278	Mixed	Catholic	No	Yes
St Bernadettes Senior NSDublin 22	800 m	194	Mixed	Catholic	No	Yes
Linn Dara SchoolsDublin 10	1.2 km	51	Mixed	Multi-denominational	No	No

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

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Contact

Rowlagh
Clondalkin
Dublin 22
D22WN40

Principal: Aileen Twomey on the Department of Education's 2025/26 schools list
Phone: 01 626 2563
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 St Marys Sen NS, on our sister site.

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Next school holidays

In 8 daysOctober mid-term breakMon, 26 October to Fri 30 October 2026
In 9 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 St Marys Sen NS for any extra days off and the last day in June. Get reminders · All term dates · Add to Google Calendar