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
23.12
2025/26
Mainstream classes
16
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
2
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
360
13
27.69
31
2
2007/08
370
13
28.46
33
4
2008/09
383
14
27.36
31
7
2009/10
393
14
28.07
31
4
2010/11
401
14
28.64
34
6
2011/12
405
15
27.00
32
5
2012/13
438
16
27.38
32
5
2013/14
450
16
28.12
32
7
2014/15
454
16
28.38
32
7
2015/16
447
16
27.94
32
6
2016/17
433
16
27.06
32
3
2017/18
429
16
26.81
32
3
2019/20
422
16
26.38
32
4
2020/21
418
17
24.59
32
4
2021/22
389
16
24.31
30
2
2022/23
378
16
23.62
27
0
2023/24
369
16
23.06
27
0
2024/25
381
15
25.40
30
2
2025/26
370
16
23.12
30
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 163 in 1983/84 → 384, +221 pupils.
Biggest loss in a single year: 2021/22: 418 in 2020/21 → 389, -29 pupils.
Largest single-class increase: Junior Infants in 2024/25 (45 → 60, +15).
Largest single-class decrease: Junior Infants in 2025/26 (60 → 45, -15).
Largest cohort-step gain: 3rd → 4th in 2022/23 (46 → 48, +2).
Largest cohort-step loss: 1st → 2nd in 2021/22 (46 → 42, -4).
Overall: 20 (1979/80) → 376 (2025/26), 356.
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
43
60
50.2
6
Senior Infants
42
60
50.2
6
1st Class
41
53
47.3
6
2nd Class
41
52
46.3
6
3rd Class
40
50
44.8
6
4th Class
41
53
46.8
6
5th Class
40
61
48.5
6
6th Class
40
63
51.0
6
Total
20
454
366.0
38
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).