S N na Lanai Glasa
Dublin 3 · Roll number 17730I
- Church Of Ireland ethos
- Not DEIS
- Pupils in 2025/26
- 285
- +4 on 2024/25
- Over 10 years
- +5%
- Up 13 from 272 in 2015/16
- Girls and boys
- 142 / 143
- 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
285 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 | 47 | 28 | 52 | 30 | 29 | 29 | 35.8 |
| Senior Infants | 30 | 49 | 28 | 51 | 30 | 30 | 36.3 |
| 1st Class | 28 | 32 | 47 | 28 | 54 | 31 | 36.7 |
| 2nd Class | 28 | 28 | 32 | 48 | 29 | 54 | 36.5 |
| 3rd Class | 32 | 29 | 28 | 34 | 47 | 30 | 33.3 |
| 4th Class | 33 | 28 | 27 | 28 | 35 | 48 | 33.2 |
| 5th Class | 60 | 30 | 29 | 28 | 28 | 34 | 34.8 |
| 6th Class | 28 | 57 | 28 | 31 | 29 | 29 | 33.7 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2024/25
29 in Junior Infants (2024/25), 30 in Senior Infants (2025/26): 1 pupil more.
- 29Junior Infants2024/25
- 30Senior Infants2025/26
Started Junior Infants in 2023/24
30 in Junior Infants (2023/24), 31 in 1st Class (2025/26): 1 pupil more.
- 30Junior Infants2023/24
- 30Senior Infants2024/25
- 311st Class2025/26
Started Junior Infants in 2022/23
52 in Junior Infants (2022/23), 54 in 2nd Class (2025/26): 2 pupils more.
- 52Junior Infants2022/23
- 51Senior Infants2023/24
- 541st Class2024/25
- 542nd Class2025/26
Started Junior Infants in 2021/22
28 in Junior Infants (2021/22), 30 in 3rd Class (2025/26): 2 pupils more.
- 28Junior Infants2021/22
- 28Senior Infants2022/23
- 281st Class2023/24
- 292nd Class2024/25
- 303rd Class2025/26
Started Junior Infants in 2020/21
47 in Junior Infants (2020/21), 48 in 4th Class (2025/26): 1 pupil more.
- 47Junior Infants2020/21
- 49Senior Infants2021/22
- 471st Class2022/23
- 482nd Class2023/24
- 473rd Class2024/25
- 484th Class2025/26
In Senior Infants in 2020/21
30 in Senior Infants (2020/21), 34 in 5th Class (2025/26): 4 pupils more.
- 30Senior Infants2020/21
- 321st Class2021/22
- 322nd Class2022/23
- 343rd Class2023/24
- 354th Class2024/25
- 345th Class2025/26
In 1st Class in 2020/21
28 in 1st Class (2020/21), 29 in 6th Class (2025/26): 1 pupil more.
- 281st Class2020/21
- 282nd Class2021/22
- 283rd Class2022/23
- 284th Class2023/24
- 285th Class2024/25
- 296th Class2025/26
In 2nd Class in 2020/21
28 in 2nd Class (2020/21), 29 in 6th Class (2024/25): 1 pupil more.
- 282nd Class2020/21
- 293rd Class2021/22
- 274th Class2022/23
- 285th Class2023/24
- 296th Class2024/25
In 3rd Class in 2020/21
32 in 3rd Class (2020/21), 31 in 6th Class (2023/24): 1 pupil fewer.
- 323rd Class2020/21
- 284th Class2021/22
- 295th Class2022/23
- 316th Class2023/24
In 4th Class in 2020/21
33 in 4th Class (2020/21), 28 in 6th Class (2022/23): 5 pupils fewer.
- 334th Class2020/21
- 305th Class2021/22
- 286th Class2022/23
In 5th Class in 2020/21
60 in 5th Class (2020/21), 57 in 6th Class (2021/22): 3 pupils fewer.
- 605th Class2020/21
- 576th Class2021/22
Biggest one-year changes in a class
- +296th Class in 2021/22 (28 to 57)
- −305th Class in 2021/22 (60 to 30)
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 S N na Lanai Glasa, 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
15.2teaching posts
Our estimate: about 15 teachers.
- Class teachersOne for each of the 11 mainstream classes 11
- PrincipalRuns the school and doesn't teach a class 1
- Special education teachers80 hours of support teaching a week 3.2
3.83 special needs assistants (SNAs) also work with pupils.
The NCSE has allocated 3.3 special education teachers and 3.83 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. Where there's no principal bar, the principal also taught a class. 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 S N na Lanai Glasa, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| S N na Lanai GlasaThis school | – | 285 |
+4.8%
|
|
| 1 | SN Eoin Baisde Boys Senior School0.6 km · Dublin 3 · Boys | 0.6 km | 317 |
−4.5%
|
| 2 | Eoin Baisde B Sois0.6 km · Dublin 3 · Boys | 0.6 km | 294 |
−12.5%
|
| 3 | S N Eoin Baisde Girls Senior0.7 km · Dublin 3 · Girls | 0.7 km | 380 |
−8.4%
|
| 4 | Eoin Baisde C Naoidh0.7 km · Dublin 3 · Girls | 0.7 km | 215 |
−14.7%
|
| 5 | St Brigids Boys N S1.1 km · Dublin 5 · Boys | 1.1 km | 287 |
−23.7%
|
| 6 | Killester Raheny Clontarf Educate Together National School1.4 km · Dublin 5 · Multi-denominational | 1.4 km | 176 | – |
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
- Aidan O'Shea
- Phone
- 015493475
- [email protected]
- Address
- Seafield Avenue, Clontarf, Dublin 3, D03 A024
School
- Ethos
- Church Of Ireland
- Patron
- Archbishop of Dublin & Bishop of Glendalough COI
- 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
- Dublin City Council
- Planning area
- Killester–Raheny–Clontarf
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
42 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 | 285 | 142 | 143 | 29 | 30 | 31 | 54 | 30 | 48 | 34 | 29 |
| 2024/25 | 281 | 143 | 138 | 29 | 30 | 54 | 29 | 47 | 35 | 28 | 29 |
| 2023/24 | 278 | 142 | 136 | 30 | 51 | 28 | 48 | 34 | 28 | 28 | 31 |
| 2022/23 | 271 | 140 | 131 | 52 | 28 | 47 | 32 | 28 | 27 | 29 | 28 |
| 2021/22 | 281 | 149 | 132 | 28 | 49 | 32 | 28 | 29 | 28 | 30 | 57 |
| 2020/21 | 286 | 153 | 133 | 47 | 30 | 28 | 28 | 32 | 33 | 60 | 28 |
| 2019/20 | 280 | 148 | 132 | – | – | – | – | – | – | – | – |
| 2018/19 | 287 | 157 | 130 | – | – | – | – | – | – | – | – |
| 2017/18 | 281 | 152 | 129 | – | – | – | – | – | – | – | – |
| 2016/17 | 265 | 133 | 132 | – | – | – | – | – | – | – | – |
| 2015/16 | 272 | 142 | 130 | – | – | – | – | – | – | – | – |
| 2014/15 | 283 | 136 | 147 | – | – | – | – | – | – | – | – |
| 2013/14 | 244 | 113 | 131 | – | – | – | – | – | – | – | – |
| 2012/13 | 213 | 100 | 113 | – | – | – | – | – | – | – | – |
| 2011/12 | 183 | 83 | 100 | – | – | – | – | – | – | – | – |
| 2010/11 | 145 | 61 | 84 | – | – | – | – | – | – | – | – |
| 2009/10 | 126 | 51 | 75 | – | – | – | – | – | – | – | – |
| 2008/09 | 129 | 55 | 74 | – | – | – | – | – | – | – | – |
| 2007/08 | 115 | 49 | 66 | – | – | – | – | – | – | – | – |
| 2006/07 | 107 | 48 | 59 | – | – | – | – | – | – | – | – |
| 2005/06 | 105 | 45 | 60 | – | – | – | – | – | – | – | – |
| 2004/05 | 98 | 46 | 52 | – | – | – | – | – | – | – | – |
| 2003/04 | 96 | 43 | 53 | – | – | – | – | – | – | – | – |
| 2002/03 | 100 | 45 | 55 | – | – | – | – | – | – | – | – |
| 2001/02 | 73 | 30 | 43 | – | – | – | – | – | – | – | – |
| 2000/01 | 61 | 23 | 38 | – | – | – | – | – | – | – | – |
| 1999/00 | 61 | 26 | 35 | – | – | – | – | – | – | – | – |
| 1998/99 | 42 | 16 | 26 | – | – | – | – | – | – | – | – |
| 1997/98 | 48 | 21 | 27 | – | – | – | – | – | – | – | – |
| 1996/97 | 46 | 21 | 25 | – | – | – | – | – | – | – | – |
| 1995/96 | 50 | 24 | 26 | – | – | – | – | – | – | – | – |
| 1994/95 | 54 | 26 | 28 | – | – | – | – | – | – | – | – |
| 1993/94 | 47 | 24 | 23 | – | – | – | – | – | – | – | – |
| 1982/83 | 62 | 27 | 35 | – | – | – | – | – | – | – | – |
| 1981/82 | 67 | 31 | 36 | – | – | – | – | – | – | – | – |
| 1980/81 | 62 | 25 | 37 | – | – | – | – | – | – | – | – |
| 1979/80 | 65 | 34 | 31 | – | – | – | – | – | – | – | – |
| 1978/79 | 80 | 38 | 42 | – | – | – | – | – | – | – | – |
| 1977/78 | 67 | 36 | 31 | – | – | – | – | – | – | – | – |
| 1976/77 | 78 | 39 | 39 | – | – | – | – | – | – | – | – |
| 1975/76 | 75 | – | – | – | – | – | – | – | – | – | – |
| 1974/75 | 68 | 41 | 27 | – | – | – | – | – | – | – | – |