St Thomas Junior N S
Dublin 24 · Roll number 19702N
- Catholic ethos
- DEIS
- Pupils in 2025/26
- 300
- −8 on 2024/25
- Over 10 years
- −28%
- Down 114 from 414 in 2015/16
- Girls and boys
- 150 / 150
- 50% girls
Pupils since 1980
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
300 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 | 76 | 77 | 85 | 81 | 70 | 72 | 76.8 |
| Senior Infants | 82 | 76 | 71 | 84 | 79 | 62 | 75.7 |
| 1st Class | 91 | 82 | 73 | 71 | 83 | 85 | 80.8 |
| 2nd Class | 96 | 97 | 81 | 72 | 76 | 81 | 83.8 |
| 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
70 in Junior Infants (2024/25), 62 in Senior Infants (2025/26): 8 pupils fewer.
- 70Junior Infants2024/25
- 62Senior Infants2025/26
Started Junior Infants in 2023/24
81 in Junior Infants (2023/24), 85 in 1st Class (2025/26): 4 pupils more.
- 81Junior Infants2023/24
- 79Senior Infants2024/25
- 851st Class2025/26
Started Junior Infants in 2022/23
85 in Junior Infants (2022/23), 81 in 2nd Class (2025/26): 4 pupils fewer.
- 85Junior Infants2022/23
- 84Senior Infants2023/24
- 831st Class2024/25
- 812nd Class2025/26
Started Junior Infants in 2021/22
77 in Junior Infants (2021/22), 0 in 3rd Class (2025/26): 77 pupils fewer.
- 77Junior Infants2021/22
- 71Senior Infants2022/23
- 711st Class2023/24
- 762nd Class2024/25
- 03rd Class2025/26
Started Junior Infants in 2020/21
76 in Junior Infants (2020/21), 0 in 4th Class (2025/26): 76 pupils fewer.
- 76Junior Infants2020/21
- 76Senior Infants2021/22
- 731st Class2022/23
- 722nd Class2023/24
- 04th Class2025/26
In Senior Infants in 2020/21
82 in Senior Infants (2020/21), 0 in 5th Class (2025/26): 82 pupils fewer.
- 82Senior Infants2020/21
- 821st Class2021/22
- 812nd Class2022/23
- 05th Class2025/26
In 1st Class in 2020/21
91 in 1st Class (2020/21), 0 in 6th Class (2025/26): 91 pupils fewer.
- 911st Class2020/21
- 972nd Class2021/22
- 06th Class2025/26
Biggest one-year changes in a class
- +13Senior Infants in 2023/24 (71 to 84)
- −17Senior Infants in 2025/26 (79 to 62)
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 Thomas 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
32.3teaching posts
Our estimate: about 32 teachers.
- Class teachersOne for each of the 21 mainstream classes 21
- PrincipalRuns the school and doesn't teach a class 1
- Special education teachers257.5 hours of support teaching a week 10.3
12.99 special needs assistants (SNAs) also work with pupils.
The NCSE has allocated 10.2 special education teachers and 12.99 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 Thomas Junior N S, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| St Thomas Junior N SThis school | – | 300 |
−27.5%
|
|
| 1 | St Thomas Senior N S0.1 km · Dublin 24 · DEIS | 0.1 km | 331 |
−25.1%
|
| 2 | Scoil Chaitlin Maude0.7 km · Baile Átha Cliath 24 · Gaelscoil · Multi-denominational · DEIS | 0.7 km | 284 |
−9.3%
|
| 3 | Scoil Cnoc Mhuire Junior0.8 km · Dublin 24 · DEIS | 0.8 km | 141 |
−23.4%
|
| 4 | St Aidans NS0.8 km · Dublin 24 · DEIS | 0.8 km | 244 |
−22.8%
|
| 5 | Scoil Cnoc Mhuire Sin0.9 km · Dublin 24 · DEIS | 0.9 km | 145 |
−1.4%
|
| 6 | Tallaght Community National School0.9 km · Dublin 24 · Multi-denominational · DEIS | 0.9 km | 151 |
+57.3%
|
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
- Suzanne O'Reilly
- Phone
- 014525855
- [email protected]
- Address
- Fortunestown Road, Tallaght, Dublin 24, D24 X577
School
- Ethos
- Catholic
- Patron
- Archbishop of Dublin
- School type
- Ordinary
- 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
- 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
37 school years from 1980/81 to 2025/26. Class figures start in 2020/21.
| Year | Total | Girls | Boys | JI | SI | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/26 | 300 | 150 | 150 | 72 | 62 | 85 | 81 | 0 | 0 | 0 | 0 |
| 2024/25 | 308 | 152 | 156 | 70 | 79 | 83 | 76 | – | – | – | – |
| 2023/24 | 308 | 155 | 153 | 81 | 84 | 71 | 72 | – | – | – | – |
| 2022/23 | 310 | 167 | 143 | 85 | 71 | 73 | 81 | – | – | – | – |
| 2021/22 | 332 | 175 | 157 | 77 | 76 | 82 | 97 | – | – | – | – |
| 2020/21 | 345 | 189 | 156 | 76 | 82 | 91 | 96 | – | – | – | – |
| 2019/20 | 362 | 184 | 178 | – | – | – | – | – | – | – | – |
| 2018/19 | 368 | 171 | 197 | – | – | – | – | – | – | – | – |
| 2017/18 | 377 | 173 | 204 | – | – | – | – | – | – | – | – |
| 2016/17 | 392 | 181 | 211 | – | – | – | – | – | – | – | – |
| 2015/16 | 414 | 195 | 219 | – | – | – | – | – | – | – | – |
| 2014/15 | 419 | 199 | 220 | – | – | – | – | – | – | – | – |
| 2013/14 | 432 | 210 | 222 | – | – | – | – | – | – | – | – |
| 2012/13 | 429 | 202 | 227 | – | – | – | – | – | – | – | – |
| 2011/12 | 433 | 206 | 227 | – | – | – | – | – | – | – | – |
| 2010/11 | 466 | 224 | 242 | – | – | – | – | – | – | – | – |
| 2009/10 | 469 | 227 | 242 | – | – | – | – | – | – | – | – |
| 2008/09 | 474 | 235 | 239 | – | – | – | – | – | – | – | – |
| 2007/08 | 473 | 213 | 260 | – | – | – | – | – | – | – | – |
| 2006/07 | 437 | 198 | 239 | – | – | – | – | – | – | – | – |
| 2005/06 | 400 | 188 | 212 | – | – | – | – | – | – | – | – |
| 2004/05 | 372 | 168 | 204 | – | – | – | – | – | – | – | – |
| 2003/04 | 380 | 181 | 199 | – | – | – | – | – | – | – | – |
| 2002/03 | 394 | 185 | 209 | – | – | – | – | – | – | – | – |
| 2001/02 | 396 | 196 | 200 | – | – | – | – | – | – | – | – |
| 2000/01 | 401 | 208 | 193 | – | – | – | – | – | – | – | – |
| 1999/00 | 430 | 214 | 216 | – | – | – | – | – | – | – | – |
| 1998/99 | 449 | 233 | 216 | – | – | – | – | – | – | – | – |
| 1997/98 | 470 | 240 | 230 | – | – | – | – | – | – | – | – |
| 1996/97 | 462 | 230 | 232 | – | – | – | – | – | – | – | – |
| 1995/96 | 507 | 248 | 259 | – | – | – | – | – | – | – | – |
| 1994/95 | 546 | 251 | 295 | – | – | – | – | – | – | – | – |
| 1993/94 | 588 | 253 | 335 | – | – | – | – | – | – | – | – |
| 1983/84 | 600 | 264 | 336 | – | – | – | – | – | – | – | – |
| 1982/83 | 692 | 329 | 363 | – | – | – | – | – | – | – | – |
| 1981/82 | 512 | 244 | 268 | – | – | – | – | – | – | – | – |
| 1980/81 | 247 | 121 | 126 | – | – | – | – | – | – | – | – |