Mainstream class group data is shown separately from standard/year-group enrolment data. The source does not identify which standard/year group each class group belongs to.
Average class size
23.88
2025/26
Mainstream classes
16
2025/26
Largest class group
27
2025/26
Classes with 30+ pupils
0
2025/26
Class group metrics trend
Class group metrics by year
Year
Mainstream class pupils
Mainstream classes
Average class size
Largest class
Classes 30+
2006/07
273
10
27.30
30
3
2007/08
333
12
27.75
30
3
2008/09
379
14
27.07
34
6
2009/10
388
14
27.71
35
2
2010/11
424
15
28.27
35
3
2011/12
444
16
27.75
30
4
2012/13
437
16
27.31
30
3
2013/14
444
16
27.75
30
1
2014/15
437
16
27.31
30
1
2015/16
441
16
27.56
30
1
2016/17
438
16
27.38
30
1
2017/18
449
16
28.06
30
2
2019/20
442
16
27.62
30
1
2020/21
439
16
27.44
30
2
2021/22
438
16
27.38
30
1
2022/23
425
16
26.56
30
1
2023/24
416
16
26.00
28
0
2024/25
399
16
24.94
27
0
2025/26
382
16
23.88
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2004/05: 95 in 2003/04 → 158, +63 pupils.
Biggest loss in a single year: 2022/23: 438 in 2021/22 → 425, -13 pupils.
Largest single-class increase: Junior Infants in 2021/22 (50 → 54, +4).
Largest single-class decrease: 4th Class in 2021/22 (59 → 52, -7).
Largest cohort-step gain: JI → SI in 2021/22 (50 → 52, +2).
Largest cohort-step loss: 3rd → 4th in 2025/26 (50 → 47, -3).
Overall: 21 (2001/02) → 394 (2025/26), 373.
Summary statistics (class-level data)
Min / max / mean enrolment per class across the available final by-standard years.
Class
Min
Max
Mean
Years
Junior Infants
47
54
49.8
6
Senior Infants
48
56
51.5
6
1st Class
46
56
51.5
6
2nd Class
50
56
52.7
6
3rd Class
50
55
52.5
6
4th Class
47
59
52.7
6
5th Class
50
59
54.2
6
6th Class
52
58
54.7
6
Total
21
449
353.5
25
Total enrolment over time
Total and gender trends use historical records where available. Class-level data starts in 2020/21.
Enrolment by gender over time
Enrolment by class over time
Cohort progression
Track how each cohort (pupils who were in the same class in the same year) progresses through the school. Each step shows the count; the number between steps is the net change (pupils gained minus pupils lost).