St Marys School
Dublin 24 · Roll number 18411U
- Catholic ethos
- Not DEIS
- Pupils in 2025/26
- 349
- +26 on 2024/25
- Over 10 years
- −9%
- Down 35 from 384 in 2015/16
- Girls and boys
- 163 / 186
- 47% girls
Pupils since 1974
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
349 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 | 28 | 50 | 53 | 45 | 51 | 45 | 45.3 |
| Senior Infants | 55 | 28 | 51 | 52 | 40 | 51 | 46.2 |
| 1st Class | 19 | 50 | 28 | 52 | 52 | 39 | 40.0 |
| 2nd Class | 28 | 21 | 48 | 25 | 55 | 54 | 38.5 |
| 3rd Class | 37 | 27 | 20 | 50 | 28 | 54 | 36.0 |
| 4th Class | 52 | 34 | 28 | 20 | 51 | 26 | 35.2 |
| 5th Class | 50 | 54 | 34 | 26 | 22 | 55 | 40.2 |
| 6th Class | 46 | 50 | 51 | 37 | 24 | 25 | 38.8 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2024/25
51 in Junior Infants (2024/25), 51 in Senior Infants (2025/26): no change.
- 51Junior Infants2024/25
- 51Senior Infants2025/26
Started Junior Infants in 2023/24
45 in Junior Infants (2023/24), 39 in 1st Class (2025/26): 6 pupils fewer.
- 45Junior Infants2023/24
- 40Senior Infants2024/25
- 391st Class2025/26
Started Junior Infants in 2022/23
53 in Junior Infants (2022/23), 54 in 2nd Class (2025/26): 1 pupil more.
- 53Junior Infants2022/23
- 52Senior Infants2023/24
- 521st Class2024/25
- 542nd Class2025/26
Started Junior Infants in 2021/22
50 in Junior Infants (2021/22), 54 in 3rd Class (2025/26): 4 pupils more.
- 50Junior Infants2021/22
- 51Senior Infants2022/23
- 521st Class2023/24
- 552nd Class2024/25
- 543rd Class2025/26
Started Junior Infants in 2020/21
28 in Junior Infants (2020/21), 26 in 4th Class (2025/26): 2 pupils fewer.
- 28Junior Infants2020/21
- 28Senior Infants2021/22
- 281st Class2022/23
- 252nd Class2023/24
- 283rd Class2024/25
- 264th Class2025/26
In Senior Infants in 2020/21
55 in Senior Infants (2020/21), 55 in 5th Class (2025/26): no change.
- 55Senior Infants2020/21
- 501st Class2021/22
- 482nd Class2022/23
- 503rd Class2023/24
- 514th Class2024/25
- 555th Class2025/26
In 1st Class in 2020/21
19 in 1st Class (2020/21), 25 in 6th Class (2025/26): 6 pupils more.
- 191st Class2020/21
- 212nd Class2021/22
- 203rd Class2022/23
- 204th Class2023/24
- 225th Class2024/25
- 256th Class2025/26
In 2nd Class in 2020/21
28 in 2nd Class (2020/21), 24 in 6th Class (2024/25): 4 pupils fewer.
- 282nd Class2020/21
- 273rd Class2021/22
- 284th Class2022/23
- 265th Class2023/24
- 246th Class2024/25
In 3rd Class in 2020/21
37 in 3rd Class (2020/21), 37 in 6th Class (2023/24): no change.
- 373rd Class2020/21
- 344th Class2021/22
- 345th Class2022/23
- 376th Class2023/24
In 4th Class in 2020/21
52 in 4th Class (2020/21), 51 in 6th Class (2022/23): 1 pupil fewer.
- 524th Class2020/21
- 545th Class2021/22
- 516th Class2022/23
In 5th Class in 2020/21
50 in 5th Class (2020/21), 50 in 6th Class (2021/22): no change.
- 505th Class2020/21
- 506th Class2021/22
Biggest one-year changes in a class
- +335th Class in 2025/26 (22 to 55)
- −27Senior Infants in 2021/22 (55 to 28)
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 School, 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
23.8teaching posts
Our estimate: about 24 teachers.
- Class teachersOne for each of the 14 mainstream classes 14
- PrincipalRuns the school and doesn't teach a class 1
- Special education teachers220 hours of support teaching a week 8.8
10.32 special needs assistants (SNAs) also work with pupils.
The NCSE has allocated 9.6 special education teachers and 10.32 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 School, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| St Marys SchoolThis school | – | 349 |
−9.1%
|
|
| 1 | St Dominic's National School0.5 km · Dublin 24 · DEIS | 0.5 km | 410 |
+40.4%
|
| 2 | S N Aenghusa0.8 km · Dublin 24 · DEIS | 0.8 km | 209 |
+10.6%
|
| 3 | Scoil Aenghusa Jun NS0.8 km · Dublin 24 · DEIS | 0.8 km | 159 |
−37.6%
|
| 4 | Scoil Santain0.9 km · Baile Átha Cliath 24 · Gaelscoil · DEIS | 0.9 km | 262 |
−27.4%
|
| 5 | St Kevins Boys1.1 km · Dublin 24 · Boys | 1.1 km | 275 |
−16.4%
|
| 6 | St Kevins Girls1.2 km · Dublin 24 · Girls | 1.2 km | 257 |
−12.9%
|
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
- Shane Cadigan
- Phone
- 014515387
- [email protected]
- Address
- Greenhills Road, Tallaght, Dublin 24, D24 K248
School
- Ethos
- Catholic
- Patron
- Archbishop of Dublin
- School type
- Ordinary
- School level
- All Through
- DEIS
- Not 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
- Tallaght
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
43 school years from 1974/75 to 2025/26. Class figures start in 2020/21.
| Year | Total | Girls | Boys | JI | SI | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/26 | 349 | 163 | 186 | 45 | 51 | 39 | 54 | 54 | 26 | 55 | 25 |
| 2024/25 | 323 | 151 | 172 | 51 | 40 | 52 | 55 | 28 | 51 | 22 | 24 |
| 2023/24 | 307 | 142 | 165 | 45 | 52 | 52 | 25 | 50 | 20 | 26 | 37 |
| 2022/23 | 313 | 142 | 171 | 53 | 51 | 28 | 48 | 20 | 28 | 34 | 51 |
| 2021/22 | 314 | 144 | 170 | 50 | 28 | 50 | 21 | 27 | 34 | 54 | 50 |
| 2020/21 | 315 | 146 | 169 | 28 | 55 | 19 | 28 | 37 | 52 | 50 | 46 |
| 2019/20 | 341 | 164 | 177 | – | – | – | – | – | – | – | – |
| 2018/19 | 337 | 170 | 167 | – | – | – | – | – | – | – | – |
| 2017/18 | 364 | 192 | 172 | – | – | – | – | – | – | – | – |
| 2016/17 | 375 | 192 | 183 | – | – | – | – | – | – | – | – |
| 2015/16 | 384 | 194 | 190 | – | – | – | – | – | – | – | – |
| 2014/15 | 387 | 194 | 193 | – | – | – | – | – | – | – | – |
| 2013/14 | 363 | 188 | 175 | – | – | – | – | – | – | – | – |
| 2012/13 | 364 | 181 | 183 | – | – | – | – | – | – | – | – |
| 2011/12 | 337 | 152 | 185 | – | – | – | – | – | – | – | – |
| 2010/11 | 332 | 143 | 189 | – | – | – | – | – | – | – | – |
| 2009/10 | 312 | 136 | 176 | – | – | – | – | – | – | – | – |
| 2008/09 | 320 | 145 | 175 | – | – | – | – | – | – | – | – |
| 2007/08 | 293 | 131 | 162 | – | – | – | – | – | – | – | – |
| 2006/07 | 267 | 121 | 146 | – | – | – | – | – | – | – | – |
| 2005/06 | 276 | 122 | 154 | – | – | – | – | – | – | – | – |
| 2004/05 | 271 | 123 | 148 | – | – | – | – | – | – | – | – |
| 2003/04 | 267 | 121 | 146 | – | – | – | – | – | – | – | – |
| 2002/03 | 276 | 121 | 155 | – | – | – | – | – | – | – | – |
| 2001/02 | 275 | 119 | 156 | – | – | – | – | – | – | – | – |
| 2000/01 | 265 | 120 | 145 | – | – | – | – | – | – | – | – |
| 1999/00 | 266 | 121 | 145 | – | – | – | – | – | – | – | – |
| 1998/99 | 266 | 121 | 145 | – | – | – | – | – | – | – | – |
| 1997/98 | 270 | 124 | 146 | – | – | – | – | – | – | – | – |
| 1996/97 | 269 | 125 | 144 | – | – | – | – | – | – | – | – |
| 1995/96 | 285 | 128 | 157 | – | – | – | – | – | – | – | – |
| 1994/95 | 278 | 128 | 150 | – | – | – | – | – | – | – | – |
| 1993/94 | 279 | 122 | 157 | – | – | – | – | – | – | – | – |
| 1983/84 | 488 | 241 | 247 | – | – | – | – | – | – | – | – |
| 1982/83 | 474 | 233 | 241 | – | – | – | – | – | – | – | – |
| 1981/82 | 470 | 248 | 222 | – | – | – | – | – | – | – | – |
| 1980/81 | 481 | 273 | 208 | – | – | – | – | – | – | – | – |
| 1979/80 | 464 | 279 | 185 | – | – | – | – | – | – | – | – |
| 1978/79 | 458 | – | – | – | – | – | – | – | – | – | – |
| 1977/78 | 457 | 311 | 146 | – | – | – | – | – | – | – | – |
| 1976/77 | 434 | 327 | 107 | – | – | – | – | – | – | – | – |
| 1975/76 | 370 | – | – | – | – | – | – | – | – | – | – |
| 1974/75 | 511 | 0 | 511 | – | – | – | – | – | – | – | – |