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
22.13
2025/26
Mainstream classes
15
2025/26
Largest class group
32
2025/26
Classes with 30+ pupils
1
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
501
17
29.47
34
11
2007/08
515
18
28.61
35
11
2008/09
520
19
27.37
35
10
2009/10
524
19
27.58
36
9
2010/11
500
19
26.32
35
8
2011/12
515
18
28.61
35
9
2012/13
495
19
26.05
35
8
2013/14
500
18
27.78
36
8
2014/15
495
18
27.50
37
8
2015/16
498
18
27.67
36
8
2016/17
489
18
27.17
36
8
2017/18
461
18
25.61
36
5
2019/20
416
17
24.47
31
4
2020/21
411
16
25.69
36
5
2021/22
392
16
24.50
32
4
2022/23
392
16
24.50
33
3
2023/24
370
16
23.12
31
1
2024/25
347
16
21.69
29
0
2025/26
332
15
22.13
32
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1979/80: 751 in 1978/79 → 789, +38 pupils.
Biggest loss in a single year: 1993/94: 735 in 1982/83 → 449, -286 pupils.
Largest single-class increase: 1st Class in 2022/23 (38 → 52, +14).
Largest single-class decrease: 1st Class in 2023/24 (52 → 38, -14).
Largest cohort-step gain: 2nd → 3rd in 2025/26 (39 → 45, +6).
Largest cohort-step loss: SI → 1st in 2024/25 (41 → 35, -6).
Overall: 738 (1975/76) → 338 (2025/26), -400.
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
32
44
38.3
6
Senior Infants
36
49
39.7
6
1st Class
35
52
41.2
6
2nd Class
32
53
42.3
6
3rd Class
43
55
48.2
6
4th Class
44
62
51.8
6
5th Class
44
64
54.3
6
6th Class
46
72
59.3
6
Total
338
794
506.6
41
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).