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
24.68
2025/26
Mainstream classes
19
2025/26
Largest class group
33
2025/26
Classes with 30+ pupils
7
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
465
18
25.83
33
4
2007/08
497
19
26.16
30
2
2008/09
501
19
26.37
33
4
2009/10
507
19
26.68
31
4
2010/11
498
19
26.21
36
4
2011/12
525
19
27.63
37
6
2012/13
536
19
28.21
37
5
2013/14
541
20
27.05
36
5
2014/15
543
20
27.15
35
5
2015/16
549
20
27.45
36
6
2016/17
559
21
26.62
35
6
2017/18
555
21
26.43
37
6
2019/20
534
21
25.43
34
6
2020/21
511
21
24.33
33
6
2021/22
493
20
24.65
33
8
2022/23
495
20
24.75
33
6
2023/24
466
20
23.30
33
6
2024/25
470
19
24.74
33
6
2025/26
469
19
24.68
33
7
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1978/79: 51 in 1977/78 → 446, +395 pupils.
Biggest loss in a single year: 1993/94: 658 in 1983/84 → 608, -50 pupils.
Largest single-class increase: Senior Infants in 2025/26 (46 → 60, +14).
Largest single-class decrease: Junior Infants in 2023/24 (65 → 46, -19).
Largest cohort-step gain: JI → SI in 2025/26 (56 → 60, +4).
Largest cohort-step loss: SI → 1st in 2021/22 (72 → 67, -5).
Overall: 51 (1977/78) → 469 (2025/26), 418.
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
46
65
54.7
6
Senior Infants
46
72
59.0
6
1st Class
46
67
59.2
6
2nd Class
55
69
63.2
6
3rd Class
56
66
63.0
6
4th Class
58
65
62.5
6
5th Class
60
64
62.8
6
6th Class
58
67
62.5
6
Total
51
658
534.8
40
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).