St Marys Junior N S
Dublin 22 · Roll number 19575J
- Catholic ethos
- DEIS
- Ordinary with Special Classes
- Pupils in 2025/26
- 183
- −4 on 2024/25
- Over 10 years
- −19%
- Down 44 from 227 in 2015/16
- Girls and boys
- 93 / 90
- 51% girls
Pupils since 1977
Total enrolment each school year
Shaded: the last 10 years, 2015/16 to 2025/26. 1983/84 is left out because its source file is incomplete, and no files exist for 1984/85 to 1992/93. Known data issues
Pupils by class
Published for each class from 2020/21.
This year, 2025/26
183 pupils across 8 classes
Every class, every year
Darker cells have more pupils. A group of pupils moves down one class and right one year.
| 2020/21 | 2021/22 | 2022/23 | 2023/24 | 2024/25 | 2025/26 | Average | |
|---|---|---|---|---|---|---|---|
| Junior Infants | 31 | 57 | 44 | 47 | 39 | 41 | 43.2 |
| Senior Infants | 54 | 29 | 60 | 43 | 47 | 48 | 46.8 |
| 1st Class | 42 | 54 | 29 | 59 | 41 | 49 | 45.7 |
| 2nd Class | 58 | 42 | 52 | 29 | 60 | 45 | 47.7 |
| 3rd Class | – | – | – | – | – | 0 | 0.0 |
| 4th Class | – | – | – | – | – | 0 | 0.0 |
| 5th Class | – | – | – | – | – | 0 | 0.0 |
| 6th Class | – | – | – | – | – | 0 | 0.0 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2024/25
39 in Junior Infants (2024/25), 48 in Senior Infants (2025/26): 9 pupils more.
- 39Junior Infants2024/25
- 48Senior Infants2025/26
Started Junior Infants in 2023/24
47 in Junior Infants (2023/24), 49 in 1st Class (2025/26): 2 pupils more.
- 47Junior Infants2023/24
- 47Senior Infants2024/25
- 491st Class2025/26
Started Junior Infants in 2022/23
44 in Junior Infants (2022/23), 45 in 2nd Class (2025/26): 1 pupil more.
- 44Junior Infants2022/23
- 43Senior Infants2023/24
- 411st Class2024/25
- 452nd Class2025/26
Started Junior Infants in 2021/22
57 in Junior Infants (2021/22), 0 in 3rd Class (2025/26): 57 pupils fewer.
- 57Junior Infants2021/22
- 60Senior Infants2022/23
- 591st Class2023/24
- 602nd Class2024/25
- 03rd Class2025/26
Started Junior Infants in 2020/21
31 in Junior Infants (2020/21), 0 in 4th Class (2025/26): 31 pupils fewer.
- 31Junior Infants2020/21
- 29Senior Infants2021/22
- 291st Class2022/23
- 292nd Class2023/24
- 04th Class2025/26
In Senior Infants in 2020/21
54 in Senior Infants (2020/21), 0 in 5th Class (2025/26): 54 pupils fewer.
- 54Senior Infants2020/21
- 541st Class2021/22
- 522nd Class2022/23
- 05th Class2025/26
In 1st Class in 2020/21
42 in 1st Class (2020/21), 0 in 6th Class (2025/26): 42 pupils fewer.
- 421st Class2020/21
- 422nd Class2021/22
- 06th Class2025/26
Biggest one-year changes in a class
- +31Senior Infants in 2022/23 (29 to 60)
- −25Senior Infants in 2021/22 (54 to 29)
Class sizes
Mainstream class groups, 2006/07 to 2025/26.
Why these won't match pupils by class
Mainstream class groups only. The source does not identify which standard/year group each class group belongs to. So these figures won't match the pupils-by-class figures exactly.
In 2025/26. Choose a figure to chart it.
Class sizes over time
Average class size, 2006/07 to 2025/26
Teachers
Who teaches at St Marys Junior N S, 2006/07 to 2025/26.
How we count teachers
Class teachers come from the Department of Education's class sizes: one for each mainstream class. Special education and special class teachers are the posts the National Council for Special Education (NCSE) allocates. We add a principal who doesn't teach a class where the Department's rules give the school one. These are posts, not people: part of a post can be a teacher shared with another school. Up to 2015/16 the Department counted every teacher itself. Known data issues
In 2025/26
19.2teaching posts
Our estimate: about 19 teachers.
- Class teachersOne for each of the 11 mainstream classes 11
- PrincipalRuns the school and doesn't teach a class 1
- Special education teachers130 hours of support teaching a week 5.2
- Special class teachersFor 2 autism classes 2
8.49 special needs assistants (SNAs) also work with pupils. 12 pupils are in special classes, which the class sizes leave out.
The NCSE has allocated 5.2 special education teachers, 2 special class teachers and 8.49 SNAs for next year.
Teachers since 2006/07
Teachers each school year, by role
To 2015/16: the Department of Education's count of every teacher. From 2019/20: our estimate, from class sizes and the NCSE's allocations. Dashed boxes: no special education figures were published for those years, so only class teachers and the principal are shown. Known data issues
Sources: Department of Education class sizes and teacher counts; NCSE school allocations and special classes (CC BY 4.0).
Nearby schools
The 6 primary schools closest to St Marys Junior N S, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| St Marys Junior N SThis school | – | 183 |
−19.4%
|
|
| 1 | St Marys Sen N S0.1 km · Dublin 22 · DEIS | 0.1 km | 204 |
−11.3%
|
| 2 | St Bernadettes Junior N S0.7 km · Dublin 22 · DEIS | 0.7 km | 173 |
−19.9%
|
| 3 | St Bernadettes Senior N S0.8 km · Dublin 22 · DEIS | 0.8 km | 194 |
−13.0%
|
| 4 | Neillstown N S0.8 km · Dublin 22 · DEIS | 0.8 km | 231 |
−24.3%
|
| 5 | St Peter Apostle Sen NS0.8 km · Dublin 22 · DEIS | 0.8 km | 278 |
+8.2%
|
| 6 | Divine Mercy Junior National School1.4 km · Lucan · DEIS | 1.4 km | 204 |
−61.0%
|
About this school
Inspection reports open on gov.ie, under the name the school had when it was inspected. They describe specific areas of the school's work rather than giving an overall grade. Newer schools may not have one yet.
Contact
- Principal
- Maura O'Shea
- Phone
- 016263266
- [email protected]
- Address
- Rowlagh, Clondalkin, Dublin 22, D22 H504
School
- Ethos
- Catholic
- Patron
- Archbishop of Dublin
- School type
- Ordinary with Special Classes
- School level
- Junior
- DEIS
- DEIS
Language and area
- Irish classification
- No subjects through Irish
- Gaeltacht
- Non-Gaeltacht
- Island
- Not on an island
- Local authority
- South Dublin County Council
- Planning area
- Palmerstown–Ronanstown–D20–22
Each detail is the latest one the Department of Education has recorded for this school. If a detail was left blank in 2025/26, we show it from an earlier year, so some details may be older than the pupil numbers. Known data issues
Data by year
40 school years from 1977/78 to 2025/26. Class figures start in 2020/21.
| Year | Total | Girls | Boys | JI | SI | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/26 | 183 | 93 | 90 | 41 | 48 | 49 | 45 | 0 | 0 | 0 | 0 |
| 2024/25 | 187 | 93 | 94 | 39 | 47 | 41 | 60 | – | – | – | – |
| 2023/24 | 178 | 88 | 90 | 47 | 43 | 59 | 29 | – | – | – | – |
| 2022/23 | 189 | 91 | 98 | 44 | 60 | 29 | 52 | – | – | – | – |
| 2021/22 | 187 | 89 | 98 | 57 | 29 | 54 | 42 | – | – | – | – |
| 2020/21 | 195 | 98 | 97 | 31 | 54 | 42 | 58 | – | – | – | – |
| 2019/20 | 220 | 112 | 108 | – | – | – | – | – | – | – | – |
| 2018/19 | 199 | 99 | 100 | – | – | – | – | – | – | – | – |
| 2017/18 | 208 | 101 | 107 | – | – | – | – | – | – | – | – |
| 2016/17 | 206 | 102 | 104 | – | – | – | – | – | – | – | – |
| 2015/16 | 227 | 108 | 119 | – | – | – | – | – | – | – | – |
| 2014/15 | 237 | 112 | 125 | – | – | – | – | – | – | – | – |
| 2013/14 | 232 | 110 | 122 | – | – | – | – | – | – | – | – |
| 2012/13 | 235 | 107 | 128 | – | – | – | – | – | – | – | – |
| 2011/12 | 230 | 110 | 120 | – | – | – | – | – | – | – | – |
| 2010/11 | 217 | 102 | 115 | – | – | – | – | – | – | – | – |
| 2009/10 | 231 | 103 | 128 | – | – | – | – | – | – | – | – |
| 2008/09 | 234 | 115 | 119 | – | – | – | – | – | – | – | – |
| 2007/08 | 224 | 99 | 125 | – | – | – | – | – | – | – | – |
| 2006/07 | 230 | 110 | 120 | – | – | – | – | – | – | – | – |
| 2005/06 | 217 | 106 | 111 | – | – | – | – | – | – | – | – |
| 2004/05 | 244 | 124 | 120 | – | – | – | – | – | – | – | – |
| 2003/04 | 272 | 144 | 128 | – | – | – | – | – | – | – | – |
| 2002/03 | 280 | 146 | 134 | – | – | – | – | – | – | – | – |
| 2001/02 | 281 | 135 | 146 | – | – | – | – | – | – | – | – |
| 2000/01 | 272 | 122 | 150 | – | – | – | – | – | – | – | – |
| 1999/00 | 277 | 125 | 152 | – | – | – | – | – | – | – | – |
| 1998/99 | 293 | 129 | 164 | – | – | – | – | – | – | – | – |
| 1997/98 | 334 | 159 | 175 | – | – | – | – | – | – | – | – |
| 1996/97 | 354 | 158 | 196 | – | – | – | – | – | – | – | – |
| 1995/96 | 392 | 182 | 210 | – | – | – | – | – | – | – | – |
| 1994/95 | 431 | 199 | 232 | – | – | – | – | – | – | – | – |
| 1993/94 | 461 | 223 | 238 | – | – | – | – | – | – | – | – |
| 1983/84 | 649 | 297 | 352 | – | – | – | – | – | – | – | – |
| 1982/83 | 645 | 304 | 341 | – | – | – | – | – | – | – | – |
| 1981/82 | 569 | 285 | 284 | – | – | – | – | – | – | – | – |
| 1980/81 | 544 | 279 | 265 | – | – | – | – | – | – | – | – |
| 1979/80 | 339 | 168 | 171 | – | – | – | – | – | – | – | – |
| 1978/79 | 304 | – | – | – | – | – | – | – | – | – | – |
| 1977/78 | 44 | 25 | 19 | – | – | – | – | – | – | – | – |