Scoil Naomh Mearnog
Portmarnock · Roll number 10296G
- Catholic ethos
- Not DEIS
- Ordinary with Special Classes
- Pupils in 2025/26
- 638
- +15 on 2024/25
- Over 10 years
- +28%
- Up 141 from 497 in 2015/16
- Girls and boys
- 322 / 316
- 50% 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
638 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 | 87 | 79 | 81 | 80 | 81 | 81 | 81.5 |
| Senior Infants | 89 | 89 | 74 | 81 | 79 | 84 | 82.7 |
| 1st Class | 80 | 88 | 80 | 72 | 81 | 83 | 80.7 |
| 2nd Class | 69 | 85 | 87 | 81 | 71 | 79 | 78.7 |
| 3rd Class | 80 | 69 | 81 | 87 | 78 | 71 | 77.7 |
| 4th Class | 83 | 80 | 70 | 80 | 85 | 78 | 79.3 |
| 5th Class | 85 | 84 | 78 | 66 | 77 | 83 | 78.8 |
| 6th Class | 68 | 84 | 81 | 75 | 64 | 79 | 75.2 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2024/25
81 in Junior Infants (2024/25), 84 in Senior Infants (2025/26): 3 pupils more.
- 81Junior Infants2024/25
- 84Senior Infants2025/26
Started Junior Infants in 2023/24
80 in Junior Infants (2023/24), 83 in 1st Class (2025/26): 3 pupils more.
- 80Junior Infants2023/24
- 79Senior Infants2024/25
- 831st Class2025/26
Started Junior Infants in 2022/23
81 in Junior Infants (2022/23), 79 in 2nd Class (2025/26): 2 pupils fewer.
- 81Junior Infants2022/23
- 81Senior Infants2023/24
- 811st Class2024/25
- 792nd Class2025/26
Started Junior Infants in 2021/22
79 in Junior Infants (2021/22), 71 in 3rd Class (2025/26): 8 pupils fewer.
- 79Junior Infants2021/22
- 74Senior Infants2022/23
- 721st Class2023/24
- 712nd Class2024/25
- 713rd Class2025/26
Started Junior Infants in 2020/21
87 in Junior Infants (2020/21), 78 in 4th Class (2025/26): 9 pupils fewer.
- 87Junior Infants2020/21
- 89Senior Infants2021/22
- 801st Class2022/23
- 812nd Class2023/24
- 783rd Class2024/25
- 784th Class2025/26
In Senior Infants in 2020/21
89 in Senior Infants (2020/21), 83 in 5th Class (2025/26): 6 pupils fewer.
- 89Senior Infants2020/21
- 881st Class2021/22
- 872nd Class2022/23
- 873rd Class2023/24
- 854th Class2024/25
- 835th Class2025/26
In 1st Class in 2020/21
80 in 1st Class (2020/21), 79 in 6th Class (2025/26): 1 pupil fewer.
- 801st Class2020/21
- 852nd Class2021/22
- 813rd Class2022/23
- 804th Class2023/24
- 775th Class2024/25
- 796th Class2025/26
In 2nd Class in 2020/21
69 in 2nd Class (2020/21), 64 in 6th Class (2024/25): 5 pupils fewer.
- 692nd Class2020/21
- 693rd Class2021/22
- 704th Class2022/23
- 665th Class2023/24
- 646th Class2024/25
In 3rd Class in 2020/21
80 in 3rd Class (2020/21), 75 in 6th Class (2023/24): 5 pupils fewer.
- 803rd Class2020/21
- 804th Class2021/22
- 785th Class2022/23
- 756th Class2023/24
In 4th Class in 2020/21
83 in 4th Class (2020/21), 81 in 6th Class (2022/23): 2 pupils fewer.
- 834th Class2020/21
- 845th Class2021/22
- 816th Class2022/23
In 5th Class in 2020/21
85 in 5th Class (2020/21), 84 in 6th Class (2021/22): 1 pupil fewer.
- 855th Class2020/21
- 846th Class2021/22
Biggest one-year changes in a class
- +162nd Class in 2021/22 (69 to 85)
- −15Senior Infants in 2022/23 (89 to 74)
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 Scoil Naomh Mearnog, 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
36.9teaching posts
Our estimate: about 37 teachers.
- Class teachersOne for each of the 24 mainstream classes 24
- 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 teachers197.5 hours of support teaching a week 7.9
- Special class teachersFor 2 autism classes and a speech and language class 3
13.48 special needs assistants (SNAs) also work with pupils. 7 pupils are in special classes, which the class sizes leave out.
The NCSE has allocated 8.1 special education teachers, 3 special class teachers and 13.48 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 Scoil Naomh Mearnog, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| Scoil Naomh MearnogThis school | – | 638 |
+28.4%
|
|
| 1 | St Helens Junior N S1.9 km · Portmarnock | 1.9 km | 319 |
−6.2%
|
| 2 | St Helens Senior N S2.0 km · Portmarnock | 2.0 km | 381 |
+42.7%
|
| 3 | Malahide / Portmarnock Educate Together National School2.7 km · Dublin 17 · Multi-denominational | 2.7 km | 377 |
+947.2%
|
| 4 | San Nioclas Myra2.7 km · Dublin 17 | 2.7 km | 180 |
+20.0%
|
| 5 | Stapolin Educate Together National School2.8 km · Dublin 13 · Multi-denominational | 2.8 km | 340 | – |
| 6 | St Laurence's National School2.9 km · Dublin 13 | 2.9 km | 413 |
−5.1%
|
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
- Sinéad Trimble
- Phone
- 018462060
- [email protected]
- Address
- Strand Road, Portmarnock, Co. Dublin, D13 PF29
School
- Ethos
- Catholic
- Patron
- Archbishop of Dublin
- School type
- Ordinary with Special Classes
- 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
- Fingal County Council
- Planning area
- Portmarnock
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 | 638 | 322 | 316 | 81 | 84 | 83 | 79 | 71 | 78 | 83 | 79 |
| 2024/25 | 623 | 314 | 309 | 81 | 79 | 81 | 71 | 78 | 85 | 77 | 64 |
| 2023/24 | 629 | 304 | 325 | 80 | 81 | 72 | 81 | 87 | 80 | 66 | 75 |
| 2022/23 | 639 | 303 | 336 | 81 | 74 | 80 | 87 | 81 | 70 | 78 | 81 |
| 2021/22 | 665 | 322 | 343 | 79 | 89 | 88 | 85 | 69 | 80 | 84 | 84 |
| 2020/21 | 648 | 304 | 344 | 87 | 89 | 80 | 69 | 80 | 83 | 85 | 68 |
| 2019/20 | 630 | 288 | 342 | – | – | – | – | – | – | – | – |
| 2018/19 | 619 | 284 | 335 | – | – | – | – | – | – | – | – |
| 2017/18 | 572 | 255 | 317 | – | – | – | – | – | – | – | – |
| 2016/17 | 537 | 248 | 289 | – | – | – | – | – | – | – | – |
| 2015/16 | 497 | 243 | 254 | – | – | – | – | – | – | – | – |
| 2014/15 | 458 | 220 | 238 | – | – | – | – | – | – | – | – |
| 2013/14 | 412 | 188 | 224 | – | – | – | – | – | – | – | – |
| 2012/13 | 381 | 173 | 208 | – | – | – | – | – | – | – | – |
| 2011/12 | 351 | 152 | 199 | – | – | – | – | – | – | – | – |
| 2010/11 | 336 | 144 | 192 | – | – | – | – | – | – | – | – |
| 2009/10 | 309 | 143 | 166 | – | – | – | – | – | – | – | – |
| 2008/09 | 283 | 133 | 150 | – | – | – | – | – | – | – | – |
| 2007/08 | 271 | 124 | 147 | – | – | – | – | – | – | – | – |
| 2006/07 | 261 | 133 | 128 | – | – | – | – | – | – | – | – |
| 2005/06 | 255 | 134 | 121 | – | – | – | – | – | – | – | – |
| 2004/05 | 242 | 126 | 116 | – | – | – | – | – | – | – | – |
| 2003/04 | 258 | 130 | 128 | – | – | – | – | – | – | – | – |
| 2002/03 | 275 | 145 | 130 | – | – | – | – | – | – | – | – |
| 2001/02 | 324 | 167 | 157 | – | – | – | – | – | – | – | – |
| 2000/01 | 344 | 171 | 173 | – | – | – | – | – | – | – | – |
| 1999/00 | 380 | 175 | 205 | – | – | – | – | – | – | – | – |
| 1998/99 | 405 | 183 | 222 | – | – | – | – | – | – | – | – |
| 1997/98 | 424 | 194 | 230 | – | – | – | – | – | – | – | – |
| 1996/97 | 458 | 209 | 249 | – | – | – | – | – | – | – | – |
| 1995/96 | 496 | 234 | 262 | – | – | – | – | – | – | – | – |
| 1994/95 | 533 | 254 | 279 | – | – | – | – | – | – | – | – |
| 1993/94 | 592 | 281 | 311 | – | – | – | – | – | – | – | – |
| 1983/84 | 999 | 450 | 549 | – | – | – | – | – | – | – | – |
| 1982/83 | 1,003 | 446 | 557 | – | – | – | – | – | – | – | – |
| 1981/82 | 999 | 438 | 561 | – | – | – | – | – | – | – | – |
| 1980/81 | 1,032 | 442 | 590 | – | – | – | – | – | – | – | – |
| 1979/80 | 983 | 412 | 571 | – | – | – | – | – | – | – | – |
| 1978/79 | 1,005 | – | – | – | – | – | – | – | – | – | – |
| 1977/78 | 987 | 424 | 563 | – | – | – | – | – | – | – | – |
| 1976/77 | 923 | 402 | 521 | – | – | – | – | – | – | – | – |
| 1975/76 | 804 | – | – | – | – | – | – | – | – | – | – |
| 1974/75 | 525 | 207 | 318 | – | – | – | – | – | – | – | – |