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
22.62
2025/26
Mainstream classes
21
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
439
16
27.44
34
4
2007/08
477
18
26.50
32
4
2008/09
488
18
27.11
31
4
2009/10
489
18
27.17
30
4
2010/11
491
18
27.28
30
5
2011/12
510
20
25.50
33
6
2012/13
508
18
28.22
32
7
2013/14
511
19
26.89
29
0
2014/15
507
19
26.68
32
4
2015/16
516
19
27.16
29
0
2016/17
508
20
25.40
28
0
2017/18
513
19
27.00
29
0
2019/20
513
20
25.65
29
0
2020/21
508
20
25.40
28
0
2021/22
483
20
24.15
29
0
2022/23
461
21
21.95
26
0
2023/24
492
20
24.60
29
0
2024/25
487
21
23.19
28
0
2025/26
475
21
22.62
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2003/04: 392 in 2002/03 → 439, +47 pupils.
Biggest loss in a single year: 1993/94: 334 in 1983/84 → 289, -45 pupils.
Largest single-class increase: 3rd Class in 2023/24 (45 → 71, +26).
Largest single-class decrease: 3rd Class in 2022/23 (64 → 45, -19).
Largest cohort-step gain: SI → 1st in 2023/24 (53 → 61, +8).
Largest cohort-step loss: 1st → 2nd in 2024/25 (61 → 56, -5).
Overall: 226 (1974/75) → 493 (2025/26), 267.
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
68
58.3
6
Senior Infants
50
69
60.2
6
1st Class
45
71
59.2
6
2nd Class
45
68
58.0
6
3rd Class
45
71
60.2
6
4th Class
53
71
63.8
6
5th Class
52
75
66.3
6
6th Class
54
75
67.7
6
Total
226
534
404.3
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).