Divine Mercy Senior National School
Lucan · Roll number 20187H
- Catholic ethos
- DEIS
- Pupils in 2025/26
- 274
- −32 on 2024/25
- Over 10 years
- −47%
- Down 242 from 516 in 2015/16
- Girls and boys
- 135 / 139
- 49% girls
Pupils since 2004
Total enrolment each school year
Shaded: the last 10 years, 2015/16 to 2025/26.
Pupils by class
Published for each class from 2020/21.
This year, 2025/26
274 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 | 80 | 72 | 78 | 83 | 66 | 58 | 72.8 |
| 4th Class | 107 | 87 | 74 | 76 | 84 | 61 | 81.5 |
| 5th Class | 123 | 110 | 93 | 81 | 75 | 85 | 94.5 |
| 6th Class | 125 | 121 | 109 | 103 | 81 | 70 | 101.5 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2020/21
66 in 3rd Class (2024/25), 61 in 4th Class (2025/26): 5 pupils fewer.
- 663rd Class2024/25
- 614th Class2025/26
In 3rd Class in 2023/24
83 in 3rd Class (2023/24), 85 in 5th Class (2025/26): 2 pupils more.
- 833rd Class2023/24
- 844th Class2024/25
- 855th Class2025/26
In 3rd Class in 2022/23
78 in 3rd Class (2022/23), 70 in 6th Class (2025/26): 8 pupils fewer.
- 783rd Class2022/23
- 764th Class2023/24
- 755th Class2024/25
- 706th Class2025/26
In 3rd Class in 2021/22
72 in 3rd Class (2021/22), 81 in 6th Class (2024/25): 9 pupils more.
- 723rd Class2021/22
- 744th Class2022/23
- 815th Class2023/24
- 816th Class2024/25
In 3rd Class in 2020/21
80 in 3rd Class (2020/21), 103 in 6th Class (2023/24): 23 pupils more.
- 803rd Class2020/21
- 874th Class2021/22
- 935th Class2022/23
- 1036th Class2023/24
In 4th Class in 2020/21
107 in 4th Class (2020/21), 109 in 6th Class (2022/23): 2 pupils more.
- 1074th Class2020/21
- 1105th Class2021/22
- 1096th Class2022/23
In 5th Class in 2020/21
123 in 5th Class (2020/21), 121 in 6th Class (2021/22): 2 pupils fewer.
- 1235th Class2020/21
- 1216th Class2021/22
Biggest one-year changes in a class
- +105th Class in 2025/26 (75 to 85)
- −234th Class in 2025/26 (84 to 61)
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 Divine Mercy Senior National 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
22teaching posts
Our estimate: about 22 teachers.
- Class teachersOne for each of the 13 mainstream classes 13
- PrincipalRuns the school and doesn't teach a class 1
- Special education teachers175 hours of support teaching a week 7
- Special class teachersFor an autism class 1
10 special needs assistants (SNAs) also work with pupils. 2 pupils are in special classes, which the class sizes leave out.
The NCSE has allocated 6.7 special education teachers, 3 special class teachers and 14 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 Divine Mercy Senior National School, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| Divine Mercy Senior National SchoolThis school | – | 274 |
−46.9%
|
|
| 1 | Divine Mercy Junior National School0.1 km · Lucan · DEIS | 0.1 km | 204 |
−61.0%
|
| 2 | Lucan Community National School0.2 km · Lucan · Multi-denominational | 0.2 km | 375 |
+443.5%
|
| 3 | St Peter Apostle Sen NS1.0 km · Dublin 22 · DEIS | 1.0 km | 278 |
+8.2%
|
| 4 | Lucan East ETNS1.1 km · Lucan · Multi-denominational · DEIS | 1.1 km | 416 |
−10.2%
|
| 5 | Neillstown N S1.1 km · Dublin 22 · DEIS | 1.1 km | 231 |
−24.3%
|
| 6 | Griffeen Valley Educate Together NS1.1 km · Lucan · Multi-denominational | 1.1 km | 466 |
−4.3%
|
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
- Regina Halpin
- Phone
- 014670689
- [email protected]
- Address
- Balgaddy, Lucan, Co. Dublin, K78 A393
School
- Ethos
- Catholic
- Patron
- Archbishop of Dublin
- School type
- Ordinary
- School level
- Senior
- 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
- Lucan
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
22 school years from 2004/05 to 2025/26. Class figures start in 2020/21.
| Year | Total | Girls | Boys | JI | SI | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/26 | 274 | 135 | 139 | 0 | 0 | 0 | 0 | 58 | 61 | 85 | 70 |
| 2024/25 | 306 | 145 | 161 | – | – | – | – | 66 | 84 | 75 | 81 |
| 2023/24 | 343 | 152 | 191 | – | – | – | – | 83 | 76 | 81 | 103 |
| 2022/23 | 354 | 164 | 190 | – | – | – | – | 78 | 74 | 93 | 109 |
| 2021/22 | 390 | 186 | 204 | – | – | – | – | 72 | 87 | 110 | 121 |
| 2020/21 | 435 | 208 | 227 | – | – | – | – | 80 | 107 | 123 | 125 |
| 2019/20 | 504 | 248 | 256 | – | – | – | – | – | – | – | – |
| 2018/19 | 535 | 258 | 277 | – | – | – | – | – | – | – | – |
| 2017/18 | 540 | 259 | 281 | – | – | – | – | – | – | – | – |
| 2016/17 | 508 | 243 | 265 | – | – | – | – | – | – | – | – |
| 2015/16 | 516 | 245 | 271 | – | – | – | – | – | – | – | – |
| 2014/15 | 558 | 263 | 295 | – | – | – | – | – | – | – | – |
| 2013/14 | 611 | 304 | 307 | – | – | – | – | – | – | – | – |
| 2012/13 | 630 | 311 | 319 | – | – | – | – | – | – | – | – |
| 2011/12 | 611 | 297 | 314 | – | – | – | – | – | – | – | – |
| 2010/11 | 601 | 287 | 314 | – | – | – | – | – | – | – | – |
| 2009/10 | 587 | 283 | 304 | – | – | – | – | – | – | – | – |
| 2008/09 | 547 | 262 | 285 | – | – | – | – | – | – | – | – |
| 2007/08 | 489 | 246 | 243 | – | – | – | – | – | – | – | – |
| 2006/07 | 454 | 237 | 217 | – | – | – | – | – | – | – | – |
| 2005/06 | 369 | 195 | 174 | – | – | – | – | – | – | – | – |
| 2004/05 | 290 | 140 | 150 | – | – | – | – | – | – | – | – |