St Marys N S
Lucan · Roll number 19817H
- Catholic ethos
- Not DEIS
- Ordinary with Special Classes
- Pupils in 2025/26
- 483
- −12 on 2024/25
- Over 10 years
- +14%
- Up 60 from 423 in 2015/16
- Girls and boys
- 219 / 264
- 45% girls
Pupils since 1993
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
483 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 | 68 | 53 | 52 | 75 | 52 | 68 | 61.3 |
| Senior Infants | 58 | 69 | 51 | 53 | 75 | 51 | 59.5 |
| 1st Class | 57 | 56 | 66 | 52 | 54 | 72 | 59.5 |
| 2nd Class | 74 | 55 | 54 | 67 | 51 | 54 | 59.2 |
| 3rd Class | 54 | 74 | 53 | 54 | 70 | 55 | 60.0 |
| 4th Class | 55 | 53 | 74 | 56 | 53 | 72 | 60.5 |
| 5th Class | 59 | 55 | 53 | 73 | 56 | 55 | 58.5 |
| 6th Class | 55 | 58 | 55 | 54 | 72 | 56 | 58.3 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2024/25
52 in Junior Infants (2024/25), 51 in Senior Infants (2025/26): 1 pupil fewer.
- 52Junior Infants2024/25
- 51Senior Infants2025/26
Started Junior Infants in 2023/24
75 in Junior Infants (2023/24), 72 in 1st Class (2025/26): 3 pupils fewer.
- 75Junior Infants2023/24
- 75Senior Infants2024/25
- 721st 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
- 53Senior Infants2023/24
- 541st Class2024/25
- 542nd Class2025/26
Started Junior Infants in 2021/22
53 in Junior Infants (2021/22), 55 in 3rd Class (2025/26): 2 pupils more.
- 53Junior Infants2021/22
- 51Senior Infants2022/23
- 521st Class2023/24
- 512nd Class2024/25
- 553rd Class2025/26
Started Junior Infants in 2020/21
68 in Junior Infants (2020/21), 72 in 4th Class (2025/26): 4 pupils more.
- 68Junior Infants2020/21
- 69Senior Infants2021/22
- 661st Class2022/23
- 672nd Class2023/24
- 703rd Class2024/25
- 724th Class2025/26
In Senior Infants in 2020/21
58 in Senior Infants (2020/21), 55 in 5th Class (2025/26): 3 pupils fewer.
- 58Senior Infants2020/21
- 561st Class2021/22
- 542nd Class2022/23
- 543rd Class2023/24
- 534th Class2024/25
- 555th Class2025/26
In 1st Class in 2020/21
57 in 1st Class (2020/21), 56 in 6th Class (2025/26): 1 pupil fewer.
- 571st Class2020/21
- 552nd Class2021/22
- 533rd Class2022/23
- 564th Class2023/24
- 565th Class2024/25
- 566th Class2025/26
In 2nd Class in 2020/21
74 in 2nd Class (2020/21), 72 in 6th Class (2024/25): 2 pupils fewer.
- 742nd Class2020/21
- 743rd Class2021/22
- 744th Class2022/23
- 735th Class2023/24
- 726th Class2024/25
In 3rd Class in 2020/21
54 in 3rd Class (2020/21), 54 in 6th Class (2023/24): no change.
- 543rd Class2020/21
- 534th Class2021/22
- 535th Class2022/23
- 546th Class2023/24
In 4th Class in 2020/21
55 in 4th Class (2020/21), 55 in 6th Class (2022/23): no change.
- 554th Class2020/21
- 555th Class2021/22
- 556th Class2022/23
In 5th Class in 2020/21
59 in 5th Class (2020/21), 58 in 6th Class (2021/22): 1 pupil fewer.
- 595th Class2020/21
- 586th Class2021/22
Biggest one-year changes in a class
- +23Junior Infants in 2023/24 (52 to 75)
- −24Senior Infants in 2025/26 (75 to 51)
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 Marys 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
27.8teaching posts
Our estimate: about 28 teachers.
- Class teachersOne for each of the 19 mainstream classes 19
- PrincipalRuns the school and doesn't teach a class 1
- Special education teachers145 hours of support teaching a week 5.8
- Special class teachersFor 2 autism classes 2
10.66 special needs assistants (SNAs) also work with pupils. 11 pupils are in special classes, which the class sizes leave out.
The NCSE has allocated 5.7 special education teachers, 2 special class teachers and 10.66 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 St Marys N S, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| St Marys N SThis school | – | 483 |
+14.2%
|
|
| 1 | Scoil Aine Naofa1.2 km · Lucan | 1.2 km | 614 |
+18.5%
|
| 2 | St Thomas Junior National School1.2 km · Lucan | 1.2 km | 573 |
+3.1%
|
| 3 | St. John the Evangelist National School1.7 km · Adamstown Castle | 1.7 km | 417 |
+16.5%
|
| 4 | Adamstown Castle Educate Together National School1.7 km · Adamstown · Multi-denominational | 1.7 km | 431 |
+8.0%
|
| 5 | Lucan B N S1.8 km · Lucan · Boys | 1.8 km | 501 |
−0.8%
|
| 6 | Esker Educate Together NS2.0 km · Lucan · Multi-denominational · DEIS | 2.0 km | 382 |
−11.2%
|
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 Egan
- Phone
- 016240203
- [email protected]
- Address
- Airlie Heights, Lucan, Co. Dublin, K78 KP94
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
- 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
33 school years from 1993/94 to 2025/26. Class figures start in 2020/21.
| Year | Total | Girls | Boys | JI | SI | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/26 | 483 | 219 | 264 | 68 | 51 | 72 | 54 | 55 | 72 | 55 | 56 |
| 2024/25 | 495 | 223 | 272 | 52 | 75 | 54 | 51 | 70 | 53 | 56 | 72 |
| 2023/24 | 496 | 224 | 272 | 75 | 53 | 52 | 67 | 54 | 56 | 73 | 54 |
| 2022/23 | 470 | 220 | 250 | 52 | 51 | 66 | 54 | 53 | 74 | 53 | 55 |
| 2021/22 | 485 | 229 | 256 | 53 | 69 | 56 | 55 | 74 | 53 | 55 | 58 |
| 2020/21 | 492 | 238 | 254 | 68 | 58 | 57 | 74 | 54 | 55 | 59 | 55 |
| 2019/20 | 481 | 244 | 237 | – | – | – | – | – | – | – | – |
| 2018/19 | 482 | 240 | 242 | – | – | – | – | – | – | – | – |
| 2017/18 | 453 | 218 | 235 | – | – | – | – | – | – | – | – |
| 2016/17 | 415 | 207 | 208 | – | – | – | – | – | – | – | – |
| 2015/16 | 423 | 209 | 214 | – | – | – | – | – | – | – | – |
| 2014/15 | 414 | 202 | 212 | – | – | – | – | – | – | – | – |
| 2013/14 | 415 | 196 | 219 | – | – | – | – | – | – | – | – |
| 2012/13 | 413 | 192 | 221 | – | – | – | – | – | – | – | – |
| 2011/12 | 400 | 185 | 215 | – | – | – | – | – | – | – | – |
| 2010/11 | 413 | 199 | 214 | – | – | – | – | – | – | – | – |
| 2009/10 | 379 | 182 | 197 | – | – | – | – | – | – | – | – |
| 2008/09 | 374 | 179 | 195 | – | – | – | – | – | – | – | – |
| 2007/08 | 371 | 174 | 197 | – | – | – | – | – | – | – | – |
| 2006/07 | 354 | 164 | 190 | – | – | – | – | – | – | – | – |
| 2005/06 | 325 | 149 | 176 | – | – | – | – | – | – | – | – |
| 2004/05 | 296 | 134 | 162 | – | – | – | – | – | – | – | – |
| 2003/04 | 280 | 123 | 157 | – | – | – | – | – | – | – | – |
| 2002/03 | 269 | 122 | 147 | – | – | – | – | – | – | – | – |
| 2001/02 | 277 | 131 | 146 | – | – | – | – | – | – | – | – |
| 2000/01 | 274 | 126 | 148 | – | – | – | – | – | – | – | – |
| 1999/00 | 277 | 132 | 145 | – | – | – | – | – | – | – | – |
| 1998/99 | 268 | 128 | 140 | – | – | – | – | – | – | – | – |
| 1997/98 | 288 | 147 | 141 | – | – | – | – | – | – | – | – |
| 1996/97 | 289 | 147 | 142 | – | – | – | – | – | – | – | – |
| 1995/96 | 301 | 144 | 157 | – | – | – | – | – | – | – | – |
| 1994/95 | 309 | 145 | 164 | – | – | – | – | – | – | – | – |
| 1993/94 | 326 | 152 | 174 | – | – | – | – | – | – | – | – |