St Colmcille Senior N S
Dublin 16 · Roll number 19742C
- Catholic ethos
- Not DEIS
- Pupils in 2025/26
- 744
- −13 on 2024/25
- Over 10 years
- +5%
- Up 35 from 709 in 2015/16
- Girls and boys
- 355 / 389
- 48% girls
Pupils since 1982
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
744 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 | – | – | – | – | – | 0 | 0.0 |
| Senior Infants | – | – | – | – | – | 0 | 0.0 |
| 1st Class | – | – | – | – | – | 0 | 0.0 |
| 2nd Class | – | – | – | – | – | 0 | 0.0 |
| 3rd Class | 199 | 193 | 197 | 187 | 180 | 182 | 189.7 |
| 4th Class | 202 | 194 | 193 | 196 | 185 | 178 | 191.3 |
| 5th Class | 206 | 201 | 194 | 192 | 201 | 183 | 196.2 |
| 6th Class | 195 | 207 | 198 | 193 | 191 | 201 | 197.5 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2020/21
180 in 3rd Class (2024/25), 178 in 4th Class (2025/26): 2 pupils fewer.
- 1803rd Class2024/25
- 1784th Class2025/26
In 3rd Class in 2023/24
187 in 3rd Class (2023/24), 183 in 5th Class (2025/26): 4 pupils fewer.
- 1873rd Class2023/24
- 1854th Class2024/25
- 1835th Class2025/26
In 3rd Class in 2022/23
197 in 3rd Class (2022/23), 201 in 6th Class (2025/26): 4 pupils more.
- 1973rd Class2022/23
- 1964th Class2023/24
- 2015th Class2024/25
- 2016th Class2025/26
In 3rd Class in 2021/22
193 in 3rd Class (2021/22), 191 in 6th Class (2024/25): 2 pupils fewer.
- 1933rd Class2021/22
- 1934th Class2022/23
- 1925th Class2023/24
- 1916th Class2024/25
In 3rd Class in 2020/21
199 in 3rd Class (2020/21), 193 in 6th Class (2023/24): 6 pupils fewer.
- 1993rd Class2020/21
- 1944th Class2021/22
- 1945th Class2022/23
- 1936th Class2023/24
In 4th Class in 2020/21
202 in 4th Class (2020/21), 198 in 6th Class (2022/23): 4 pupils fewer.
- 2024th Class2020/21
- 2015th Class2021/22
- 1986th Class2022/23
In 5th Class in 2020/21
206 in 5th Class (2020/21), 207 in 6th Class (2021/22): 1 pupil more.
- 2065th Class2020/21
- 2076th Class2021/22
Biggest one-year changes in a class
- +126th Class in 2021/22 (195 to 207)
- −185th Class in 2025/26 (201 to 183)
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 Colmcille Senior 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
43.7teaching posts
Our estimate: about 44 teachers.
- Class teachersOne for each of the 29 mainstream classes 29
- PrincipalRuns the school and doesn't teach a class 1
- Deputy principalDoesn't teach a class either, as larger schools and those with five or more special classes have one 1
- Special education teachers317.5 hours of support teaching a week 12.7
15 special needs assistants (SNAs) also work with pupils.
The NCSE has allocated 12.6 special education teachers and 15 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 Colmcille Senior N S, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| St Colmcille Senior N SThis school | – | 744 |
+4.9%
|
|
| 1 | Scoil Colmcille Naofa0.0 km · Dublin 16 | 0.0 km | 721 |
−11.5%
|
| 2 | Gaelscoil Chnoc Liamhna0.7 km · Baile Átha Cliath 16 · Gaelscoil | 0.7 km | 233 |
−1.3%
|
| 3 | St Patrick GNS1.1 km · Dublin 16 | 1.1 km | 472 |
−8.5%
|
| 4 | Rathfarnham Parish N S1.3 km · Dublin 14 · Church of Ireland | 1.3 km | 215 |
−7.3%
|
| 5 | Scoil Carmel1.4 km · Dublin 24 | 1.4 km | 313 |
−30.1%
|
| 6 | Ballyroan B N S1.5 km · Dublin 16 · Boys | 1.5 km | 375 |
+5.3%
|
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
- Mary Cleary
- Phone
- 014942527
- [email protected]
- Address
- Idrone Avenue, Knocklyon, Dublin 16, D16 W8K0
School
- Ethos
- Catholic
- Patron
- Archbishop of Dublin
- School type
- Ordinary
- School level
- Senior
- 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
- Rathfarnham
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
35 school years from 1982/83 to 2025/26. Class figures start in 2020/21.
| Year | Total | Girls | Boys | JI | SI | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/26 | 744 | 355 | 389 | 0 | 0 | 0 | 0 | 182 | 178 | 183 | 201 |
| 2024/25 | 757 | 359 | 398 | – | – | – | – | 180 | 185 | 201 | 191 |
| 2023/24 | 768 | 367 | 401 | – | – | – | – | 187 | 196 | 192 | 193 |
| 2022/23 | 782 | 376 | 406 | – | – | – | – | 197 | 193 | 194 | 198 |
| 2021/22 | 795 | 397 | 398 | – | – | – | – | 193 | 194 | 201 | 207 |
| 2020/21 | 802 | 394 | 408 | – | – | – | – | 199 | 202 | 206 | 195 |
| 2019/20 | 796 | 385 | 411 | – | – | – | – | – | – | – | – |
| 2018/19 | 764 | 371 | 393 | – | – | – | – | – | – | – | – |
| 2017/18 | 756 | 371 | 385 | – | – | – | – | – | – | – | – |
| 2016/17 | 744 | 354 | 390 | – | – | – | – | – | – | – | – |
| 2015/16 | 709 | 339 | 370 | – | – | – | – | – | – | – | – |
| 2014/15 | 713 | 339 | 374 | – | – | – | – | – | – | – | – |
| 2013/14 | 696 | 337 | 359 | – | – | – | – | – | – | – | – |
| 2012/13 | 704 | 366 | 338 | – | – | – | – | – | – | – | – |
| 2011/12 | 690 | 363 | 327 | – | – | – | – | – | – | – | – |
| 2010/11 | 689 | 356 | 333 | – | – | – | – | – | – | – | – |
| 2009/10 | 712 | 358 | 354 | – | – | – | – | – | – | – | – |
| 2008/09 | 709 | 342 | 367 | – | – | – | – | – | – | – | – |
| 2007/08 | 723 | 339 | 384 | – | – | – | – | – | – | – | – |
| 2006/07 | 732 | 356 | 376 | – | – | – | – | – | – | – | – |
| 2005/06 | 726 | 355 | 371 | – | – | – | – | – | – | – | – |
| 2004/05 | 734 | 357 | 377 | – | – | – | – | – | – | – | – |
| 2003/04 | 742 | 378 | 364 | – | – | – | – | – | – | – | – |
| 2002/03 | 760 | 368 | 392 | – | – | – | – | – | – | – | – |
| 2001/02 | 779 | 374 | 405 | – | – | – | – | – | – | – | – |
| 2000/01 | 762 | 367 | 395 | – | – | – | – | – | – | – | – |
| 1999/00 | 753 | 350 | 403 | – | – | – | – | – | – | – | – |
| 1998/99 | 745 | 335 | 410 | – | – | – | – | – | – | – | – |
| 1997/98 | 734 | 328 | 406 | – | – | – | – | – | – | – | – |
| 1996/97 | 752 | 336 | 416 | – | – | – | – | – | – | – | – |
| 1995/96 | 778 | 333 | 445 | – | – | – | – | – | – | – | – |
| 1994/95 | 791 | 343 | 448 | – | – | – | – | – | – | – | – |
| 1993/94 | 810 | 355 | 455 | – | – | – | – | – | – | – | – |
| 1983/84 | 477 | 193 | 284 | – | – | – | – | – | – | – | – |
| 1982/83 | 402 | 168 | 234 | – | – | – | – | – | – | – | – |