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
22.81
2025/26
Mainstream classes
27
2025/26
Largest class group
29
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
678
24
28.25
30
4
2007/08
675
24
28.12
30
3
2008/09
648
24
27.00
30
5
2009/10
666
24
27.75
30
3
2010/11
670
24
27.92
31
9
2011/12
679
24
28.29
31
8
2012/13
681
24
28.38
34
7
2013/14
687
24
28.62
31
8
2014/15
695
25
27.80
31
5
2015/16
693
25
27.72
31
1
2016/17
705
26
27.12
31
1
2017/18
693
26
26.65
30
1
2019/20
706
27
26.15
30
1
2020/21
691
26
26.58
28
0
2021/22
692
27
25.63
28
0
2022/23
675
27
25.00
29
0
2023/24
647
27
23.96
28
0
2024/25
634
27
23.48
29
0
2025/26
616
27
22.81
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 169 in 1983/84 → 859, +690 pupils.
Biggest loss in a single year: 2003/04: 835 in 2002/03 → 777, -58 pupils.
Largest single-class increase: 5th Class in 2022/23 (77 → 100, +23).
Largest single-class decrease: 3rd Class in 2021/22 (103 → 73, -30).
Largest cohort-step gain: SI → 1st in 2025/26 (65 → 69, +4).
Largest cohort-step loss: JI → SI in 2023/24 (83 → 79, -4).
Overall: 50 (1981/82) → 622 (2025/26), 572.
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
64
95
78.5
6
Senior Infants
65
93
80.0
6
1st Class
69
90
79.8
6
2nd Class
75
93
80.7
6
3rd Class
73
103
84.7
6
4th Class
74
101
82.7
6
5th Class
74
105
87.3
6
6th Class
73
103
86.5
6
Total
50
970
696.4
36
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).