Our Lady of Mercy N S
Sligo · Roll number 19985F
- Catholic ethos
- DEIS
- Ordinary with Special Classes
- Pupils in 2025/26
- 449
- +12 on 2024/25
- Over 10 years
- +9%
- Up 36 from 413 in 2015/16
- Girls and boys
- 232 / 217
- 52% 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
449 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 | 52 | 42 | 43 | 51 | 41 | 53 | 47.0 |
| Senior Infants | 40 | 50 | 47 | 48 | 54 | 45 | 47.3 |
| 1st Class | 54 | 41 | 55 | 52 | 51 | 58 | 51.8 |
| 2nd Class | 53 | 54 | 42 | 54 | 54 | 57 | 52.3 |
| 3rd Class | 50 | 50 | 55 | 45 | 58 | 60 | 53.0 |
| 4th Class | 64 | 47 | 51 | 60 | 46 | 62 | 55.0 |
| 5th Class | 63 | 62 | 48 | 53 | 60 | 51 | 56.2 |
| 6th Class | 46 | 64 | 65 | 52 | 55 | 63 | 57.5 |
JI and SI are Junior and Senior Infants.
Started Junior Infants in 2024/25
41 in Junior Infants (2024/25), 45 in Senior Infants (2025/26): 4 pupils more.
- 41Junior Infants2024/25
- 45Senior Infants2025/26
Started Junior Infants in 2023/24
51 in Junior Infants (2023/24), 58 in 1st Class (2025/26): 7 pupils more.
- 51Junior Infants2023/24
- 54Senior Infants2024/25
- 581st Class2025/26
Started Junior Infants in 2022/23
43 in Junior Infants (2022/23), 57 in 2nd Class (2025/26): 14 pupils more.
- 43Junior Infants2022/23
- 48Senior Infants2023/24
- 511st Class2024/25
- 572nd Class2025/26
Started Junior Infants in 2021/22
42 in Junior Infants (2021/22), 60 in 3rd Class (2025/26): 18 pupils more.
- 42Junior Infants2021/22
- 47Senior Infants2022/23
- 521st Class2023/24
- 542nd Class2024/25
- 603rd Class2025/26
Started Junior Infants in 2020/21
52 in Junior Infants (2020/21), 62 in 4th Class (2025/26): 10 pupils more.
- 52Junior Infants2020/21
- 50Senior Infants2021/22
- 551st Class2022/23
- 542nd Class2023/24
- 583rd Class2024/25
- 624th Class2025/26
In Senior Infants in 2020/21
40 in Senior Infants (2020/21), 51 in 5th Class (2025/26): 11 pupils more.
- 40Senior Infants2020/21
- 411st Class2021/22
- 422nd Class2022/23
- 453rd Class2023/24
- 464th Class2024/25
- 515th Class2025/26
In 1st Class in 2020/21
54 in 1st Class (2020/21), 63 in 6th Class (2025/26): 9 pupils more.
- 541st Class2020/21
- 542nd Class2021/22
- 553rd Class2022/23
- 604th Class2023/24
- 605th Class2024/25
- 636th Class2025/26
In 2nd Class in 2020/21
53 in 2nd Class (2020/21), 55 in 6th Class (2024/25): 2 pupils more.
- 532nd Class2020/21
- 503rd Class2021/22
- 514th Class2022/23
- 535th Class2023/24
- 556th Class2024/25
In 3rd Class in 2020/21
50 in 3rd Class (2020/21), 52 in 6th Class (2023/24): 2 pupils more.
- 503rd Class2020/21
- 474th Class2021/22
- 485th Class2022/23
- 526th Class2023/24
In 4th Class in 2020/21
64 in 4th Class (2020/21), 65 in 6th Class (2022/23): 1 pupil more.
- 644th Class2020/21
- 625th Class2021/22
- 656th Class2022/23
In 5th Class in 2020/21
63 in 5th Class (2020/21), 64 in 6th Class (2021/22): 1 pupil more.
- 635th Class2020/21
- 646th Class2021/22
Biggest one-year changes in a class
- +186th Class in 2021/22 (46 to 64)
- −174th Class in 2021/22 (64 to 47)
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 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
37.1teaching 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
- Special education teachers227.5 hours of support teaching a week 9.1
- Special class teachersFor 3 autism classes 3
13.16 special needs assistants (SNAs) also work with pupils. 18 pupils are in special classes, which the class sizes leave out.
The NCSE has allocated 9.2 special education teachers, 4 special class teachers and 14.2 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 N S, measured in a straight line. Pupil numbers are for 2025/26.
| Number on map | School | Distance | Pupils | Since 2015/16 |
|---|---|---|---|---|
| Our Lady of Mercy N SThis school | – | 449 |
+8.7%
|
|
| 1 | Sligo Project School0.3 km · Sligo · Multi-denominational · DEIS | 0.3 km | 52 |
+116.7%
|
| 2 | Scoil Eoin Naofa0.5 km · Sligo · DEIS | 0.5 km | 289 |
+11.2%
|
| 3 | Carbury National School0.5 km · Sligo · Church of Ireland | 0.5 km | 210 |
−10.3%
|
| 4 | St Edwards N S1.4 km · Sligo · DEIS | 1.4 km | 207 |
+11.9%
|
| 5 | S N Ursula1.4 km · Sligo | 1.4 km | 439 |
+8.7%
|
| 6 | St Brendans NS1.7 km · Sligo · DEIS | 1.7 km | 177 |
+47.5%
|
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
- Olivia Flannery
- Phone
- 0719171364
- [email protected]
- Address
- Pearse Road, Sligo, F91 YY06
School
- Ethos
- Catholic
- Patron
- Bishop of Elphin
- School type
- Ordinary with Special Classes
- School level
- All Through
- DEIS
- DEIS
Language and area
- Irish classification
- No subjects through Irish
- Gaeltacht
- Non-Gaeltacht
- Island
- Not on an island
- Local authority
- Sligo County Council
- Planning area
- Sligo
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 | 449 | 232 | 217 | 53 | 45 | 58 | 57 | 60 | 62 | 51 | 63 |
| 2024/25 | 437 | 230 | 207 | 41 | 54 | 51 | 54 | 58 | 46 | 60 | 55 |
| 2023/24 | 427 | 216 | 211 | 51 | 48 | 52 | 54 | 45 | 60 | 53 | 52 |
| 2022/23 | 418 | 209 | 209 | 43 | 47 | 55 | 42 | 55 | 51 | 48 | 65 |
| 2021/22 | 422 | 208 | 214 | 42 | 50 | 41 | 54 | 50 | 47 | 62 | 64 |
| 2020/21 | 433 | 212 | 221 | 52 | 40 | 54 | 53 | 50 | 64 | 63 | 46 |
| 2019/20 | 456 | 226 | 230 | – | – | – | – | – | – | – | – |
| 2018/19 | 470 | 225 | 245 | – | – | – | – | – | – | – | – |
| 2017/18 | 439 | 205 | 234 | – | – | – | – | – | – | – | – |
| 2016/17 | 419 | 193 | 226 | – | – | – | – | – | – | – | – |
| 2015/16 | 413 | 188 | 225 | – | – | – | – | – | – | – | – |
| 2014/15 | 404 | 191 | 213 | – | – | – | – | – | – | – | – |
| 2013/14 | 378 | 186 | 192 | – | – | – | – | – | – | – | – |
| 2012/13 | 384 | 190 | 194 | – | – | – | – | – | – | – | – |
| 2011/12 | 375 | 190 | 185 | – | – | – | – | – | – | – | – |
| 2010/11 | 389 | 203 | 186 | – | – | – | – | – | – | – | – |
| 2009/10 | 441 | 218 | 223 | – | – | – | – | – | – | – | – |
| 2008/09 | 501 | 253 | 248 | – | – | – | – | – | – | – | – |
| 2007/08 | 510 | 261 | 249 | – | – | – | – | – | – | – | – |
| 2006/07 | 503 | 249 | 254 | – | – | – | – | – | – | – | – |
| 2005/06 | 516 | 258 | 258 | – | – | – | – | – | – | – | – |
| 2004/05 | 501 | 248 | 253 | – | – | – | – | – | – | – | – |
| 2003/04 | 504 | 258 | 246 | – | – | – | – | – | – | – | – |
| 2002/03 | 502 | 260 | 242 | – | – | – | – | – | – | – | – |
| 2001/02 | 519 | 276 | 243 | – | – | – | – | – | – | – | – |
| 2000/01 | 543 | 282 | 261 | – | – | – | – | – | – | – | – |
| 1999/00 | 564 | 309 | 255 | – | – | – | – | – | – | – | – |
| 1998/99 | 595 | 338 | 257 | – | – | – | – | – | – | – | – |
| 1997/98 | 619 | 369 | 250 | – | – | – | – | – | – | – | – |
| 1996/97 | 625 | 395 | 230 | – | – | – | – | – | – | – | – |
| 1995/96 | 647 | 426 | 221 | – | – | – | – | – | – | – | – |
| 1994/95 | 662 | 460 | 202 | – | – | – | – | – | – | – | – |
| 1993/94 | 648 | 475 | 173 | – | – | – | – | – | – | – | – |