Our Lady of Mercy Convent School
Booterstown · Roll number 17970F
- Catholic ethos
- Not DEIS
- Pupils in 2025/26
- 247
- −5 on 2024/25
- Over 10 years
- +1%
- Up 3 from 244 in 2015/16
- Girls and boys
- 247 / 0
- 100% 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
247 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 | 32 | 30 | 26 | 25 | 36 | 21 | 28.3 |
| Senior Infants | 34 | 29 | 30 | 30 | 29 | 37 | 31.5 |
| 1st Class | 45 | 30 | 30 | 29 | 30 | 29 | 32.2 |
| 2nd Class | 30 | 43 | 28 | 30 | 30 | 29 | 31.7 |
| 3rd Class | 38 | 29 | 45 | 26 | 26 | 30 | 32.3 |
| 4th Class | 36 | 33 | 31 | 42 | 28 | 25 | 32.5 |
| 5th Class | 26 | 35 | 37 | 30 | 43 | 30 | 33.5 |
| 6th Class | 24 | 27 | 33 | 35 | 30 | 46 | 32.5 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2024/25
36 in Junior Infants (2024/25), 37 in Senior Infants (2025/26): 1 pupil more.
- 36Junior Infants2024/25
- 37Senior Infants2025/26
Started Junior Infants in 2023/24
25 in Junior Infants (2023/24), 29 in 1st Class (2025/26): 4 pupils more.
- 25Junior Infants2023/24
- 29Senior Infants2024/25
- 291st Class2025/26
Started Junior Infants in 2022/23
26 in Junior Infants (2022/23), 29 in 2nd Class (2025/26): 3 pupils more.
- 26Junior Infants2022/23
- 30Senior Infants2023/24
- 301st Class2024/25
- 292nd Class2025/26
Started Junior Infants in 2021/22
30 in Junior Infants (2021/22), 30 in 3rd Class (2025/26): no change.
- 30Junior Infants2021/22
- 30Senior Infants2022/23
- 291st Class2023/24
- 302nd Class2024/25
- 303rd Class2025/26
Started Junior Infants in 2020/21
32 in Junior Infants (2020/21), 25 in 4th Class (2025/26): 7 pupils fewer.
- 32Junior Infants2020/21
- 29Senior Infants2021/22
- 301st Class2022/23
- 302nd Class2023/24
- 263rd Class2024/25
- 254th Class2025/26
In Senior Infants in 2020/21
34 in Senior Infants (2020/21), 30 in 5th Class (2025/26): 4 pupils fewer.
- 34Senior Infants2020/21
- 301st Class2021/22
- 282nd Class2022/23
- 263rd Class2023/24
- 284th Class2024/25
- 305th Class2025/26
In 1st Class in 2020/21
45 in 1st Class (2020/21), 46 in 6th Class (2025/26): 1 pupil more.
- 451st Class2020/21
- 432nd Class2021/22
- 453rd Class2022/23
- 424th Class2023/24
- 435th Class2024/25
- 466th Class2025/26
In 2nd Class in 2020/21
30 in 2nd Class (2020/21), 30 in 6th Class (2024/25): no change.
- 302nd Class2020/21
- 293rd Class2021/22
- 314th Class2022/23
- 305th Class2023/24
- 306th Class2024/25
In 3rd Class in 2020/21
38 in 3rd Class (2020/21), 35 in 6th Class (2023/24): 3 pupils fewer.
- 383rd Class2020/21
- 334th Class2021/22
- 375th Class2022/23
- 356th Class2023/24
In 4th Class in 2020/21
36 in 4th Class (2020/21), 33 in 6th Class (2022/23): 3 pupils fewer.
- 364th Class2020/21
- 355th Class2021/22
- 336th Class2022/23
In 5th Class in 2020/21
26 in 5th Class (2020/21), 27 in 6th Class (2021/22): 1 pupil more.
- 265th Class2020/21
- 276th Class2021/22
Biggest one-year changes in a class
- +163rd Class in 2022/23 (29 to 45)
- −193rd Class in 2023/24 (45 to 26)
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 Our Lady of Mercy Convent 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
13.9teaching posts
Our estimate: about 14 teachers.
- Class teachersOne for each of the 10 mainstream classes 10
- PrincipalRuns the school and doesn't teach a class 1
- Special education teachers72.5 hours of support teaching a week 2.9
2.83 special needs assistants (SNAs) also work with pupils.
The NCSE has allocated 3.1 special education teachers, 1 special class teacher and 4.66 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 Our Lady of Mercy Convent School, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| Our Lady of Mercy Convent SchoolThis school | – | 247 |
+1.2%
|
|
| 1 | Booterstown Boys0.4 km · Blackrock · Boys | 0.4 km | 188 |
−35.4%
|
| 2 | Booterstown N S0.8 km · Blackrock · Church of Ireland | 0.8 km | 85 |
−18.3%
|
| 3 | S N San Treasa1.3 km · Mount Merrion | 1.3 km | 430 |
−5.7%
|
| 4 | Carysfort NS1.5 km · Blackrock | 1.5 km | 583 |
+7.0%
|
| 5 | Oatlands Primary School, An Edmund Rice School1.6 km · Blackrock | 1.6 km | 428 |
−0.7%
|
| 6 | Gaelscoil Laighean1.7 km · Baile Átha Cliath 14 · Gaelscoil · Multi-denominational | 1.7 km | 130 | – |
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
- John O'Boyle
- Phone
- 012884223
- [email protected]
- Address
- Rosemount Terrace, Booterstown, Co. Dublin, A94 V656
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
- Dun Laoghaire Rathdown
- Planning area
- Booterstown–Blackrock
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 | 247 | 247 | 0 | 21 | 37 | 29 | 29 | 30 | 25 | 30 | 46 |
| 2024/25 | 252 | 252 | – | 36 | 29 | 30 | 30 | 26 | 28 | 43 | 30 |
| 2023/24 | 247 | 247 | 0 | 25 | 30 | 29 | 30 | 26 | 42 | 30 | 35 |
| 2022/23 | 260 | 260 | – | 26 | 30 | 30 | 28 | 45 | 31 | 37 | 33 |
| 2021/22 | 256 | 256 | – | 30 | 29 | 30 | 43 | 29 | 33 | 35 | 27 |
| 2020/21 | 265 | 265 | – | 32 | 34 | 45 | 30 | 38 | 36 | 26 | 24 |
| 2019/20 | 270 | 270 | – | – | – | – | – | – | – | – | – |
| 2018/19 | 270 | 270 | – | – | – | – | – | – | – | – | – |
| 2017/18 | 261 | 261 | – | – | – | – | – | – | – | – | – |
| 2016/17 | 246 | 246 | 0 | – | – | – | – | – | – | – | – |
| 2015/16 | 244 | 244 | 0 | – | – | – | – | – | – | – | – |
| 2014/15 | 219 | 219 | 0 | – | – | – | – | – | – | – | – |
| 2013/14 | 219 | 219 | 0 | – | – | – | – | – | – | – | – |
| 2012/13 | 217 | 217 | 0 | – | – | – | – | – | – | – | – |
| 2011/12 | 220 | 220 | 0 | – | – | – | – | – | – | – | – |
| 2010/11 | 211 | 211 | 0 | – | – | – | – | – | – | – | – |
| 2009/10 | 203 | 203 | 0 | – | – | – | – | – | – | – | – |
| 2008/09 | 220 | 220 | 0 | – | – | – | – | – | – | – | – |
| 2007/08 | 223 | 223 | 0 | – | – | – | – | – | – | – | – |
| 2006/07 | 225 | 225 | 0 | – | – | – | – | – | – | – | – |
| 2005/06 | 226 | 226 | 0 | – | – | – | – | – | – | – | – |
| 2004/05 | 220 | 220 | 0 | – | – | – | – | – | – | – | – |
| 2003/04 | 256 | 256 | 0 | – | – | – | – | – | – | – | – |
| 2002/03 | 247 | 247 | 0 | – | – | – | – | – | – | – | – |
| 2001/02 | 247 | 247 | 0 | – | – | – | – | – | – | – | – |
| 2000/01 | 240 | 240 | 0 | – | – | – | – | – | – | – | – |
| 1999/00 | 272 | 272 | – | – | – | – | – | – | – | – | – |
| 1998/99 | 285 | 285 | 0 | – | – | – | – | – | – | – | – |
| 1997/98 | 281 | 281 | – | – | – | – | – | – | – | – | – |
| 1996/97 | 273 | 273 | – | – | – | – | – | – | – | – | – |
| 1995/96 | 258 | 258 | – | – | – | – | – | – | – | – | – |
| 1994/95 | 250 | 250 | – | – | – | – | – | – | – | – | – |
| 1993/94 | 255 | 255 | – | – | – | – | – | – | – | – | – |
| 1983/84 | 206 | 206 | 0 | – | – | – | – | – | – | – | – |
| 1982/83 | 174 | 174 | 0 | – | – | – | – | – | – | – | – |
| 1981/82 | 151 | 151 | 0 | – | – | – | – | – | – | – | – |
| 1980/81 | 156 | 156 | 0 | – | – | – | – | – | – | – | – |
| 1979/80 | 186 | 186 | 0 | – | – | – | – | – | – | – | – |
| 1978/79 | 192 | – | – | – | – | – | – | – | – | – | – |
| 1977/78 | 187 | 187 | 0 | – | – | – | – | – | – | – | – |
| 1976/77 | 202 | 202 | 0 | – | – | – | – | – | – | – | – |
| 1975/76 | 212 | – | – | – | – | – | – | – | – | – | – |
| 1974/75 | 237 | 237 | 0 | – | – | – | – | – | – | – | – |