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
23.55
2025/26
Mainstream classes
22
2025/26
Largest class group
28
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
332
12
27.67
37
4
2007/08
361
13
27.77
33
2
2008/09
426
16
26.62
33
4
2009/10
451
17
26.53
32
2
2010/11
496
18
27.56
34
5
2011/12
534
19
28.11
35
5
2012/13
576
21
27.43
31
3
2013/14
604
22
27.45
32
4
2014/15
645
23
28.04
32
7
2015/16
678
24
28.25
32
9
2016/17
682
24
28.42
32
10
2017/18
683
24
28.46
33
8
2019/20
643
25
25.72
30
3
2020/21
605
24
25.21
30
3
2021/22
577
24
24.04
28
0
2022/23
572
23
24.87
28
0
2023/24
558
24
23.25
29
0
2024/25
530
23
23.04
29
0
2025/26
518
22
23.55
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2008/09: 361 in 2007/08 → 426, +65 pupils.
Biggest loss in a single year: 1993/94: 190 in 1983/84 → 121, -69 pupils.
Largest single-class increase: 1st Class in 2023/24 (52 → 80, +28).
Largest single-class decrease: 5th Class in 2025/26 (78 → 55, -23).
Largest cohort-step gain: SI → 1st in 2025/26 (56 → 70, +14).
Largest cohort-step loss: JI → SI in 2021/22 (51 → 49, -2).
Overall: 120 (1974/75) → 524 (2025/26), 404.
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
49
66
56.0
6
Senior Infants
49
75
59.2
6
1st Class
52
80
65.5
6
2nd Class
54
78
67.8
6
3rd Class
54
84
69.8
6
4th Class
56
90
74.0
6
5th Class
55
92
79.5
6
6th Class
78
103
89.2
6
Total
107
683
339.8
43
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).