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
24.78
2025/26
Mainstream classes
23
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
3
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
404
15
26.93
32
4
2007/08
462
16
28.88
34
8
2008/09
469
18
26.06
33
5
2009/10
507
18
28.17
33
7
2010/11
502
18
27.89
32
6
2011/12
503
19
26.47
33
3
2012/13
517
19
27.21
31
5
2013/14
516
19
27.16
31
4
2014/15
531
19
27.95
31
7
2015/16
529
19
27.84
35
7
2016/17
531
20
26.55
33
5
2017/18
578
21
27.52
33
7
2019/20
589
23
25.61
30
1
2020/21
576
22
26.18
31
4
2021/22
550
22
25.00
31
2
2022/23
591
24
24.62
30
1
2023/24
601
24
25.04
30
3
2024/25
601
24
25.04
30
2
2025/26
570
23
24.78
30
3
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2007/08: 419 in 2006/07 → 480, +61 pupils.
Biggest loss in a single year: 2025/26: 601 in 2024/25 → 570, -31 pupils.
Largest single-class increase: 4th Class in 2022/23 (56 → 81, +25).
Largest single-class decrease: 1st Class in 2021/22 (88 → 62, -26).
Largest cohort-step gain: 3rd → 4th in 2022/23 (68 → 81, +13).
Largest cohort-step loss: JI → SI in 2021/22 (72 → 68, -4).
Overall: 413 (1993/94) → 570 (2025/26), 157.
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
50
75
67.2
6
Senior Infants
61
75
68.7
6
1st Class
62
88
74.0
6
2nd Class
65
86
73.0
6
3rd Class
57
88
71.5
6
4th Class
56
90
74.5
6
5th Class
59
89
75.7
6
6th Class
62
90
77.0
6
Total
344
601
472.9
33
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).