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
23.94
2025/26
Mainstream classes
18
2025/26
Largest class group
33
2025/26
Classes with 30+ pupils
2
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
384
14
27.43
33
6
2007/08
398
16
24.88
33
3
2008/09
391
16
24.44
32
2
2009/10
386
14
27.57
32
5
2010/11
401
14
28.64
35
6
2011/12
402
15
26.80
33
4
2012/13
404
15
26.93
35
6
2013/14
400
15
26.67
36
2
2014/15
411
15
27.40
32
5
2015/16
414
15
27.60
34
2
2016/17
443
16
27.69
30
5
2017/18
428
16
26.75
32
5
2019/20
450
17
26.47
32
2
2020/21
439
17
25.82
29
0
2021/22
440
17
25.88
30
2
2022/23
436
18
24.22
30
2
2023/24
448
18
24.89
32
4
2024/25
441
18
24.50
34
4
2025/26
431
18
23.94
33
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1977/78: 413 in 1976/77 → 511, +98 pupils.
Biggest loss in a single year: 1993/94: 802 in 1982/83 → 672, -130 pupils.
Largest single-class increase: 3rd Class in 2025/26 (51 → 66, +15).
Largest single-class decrease: 4th Class in 2025/26 (67 → 50, -17).
Largest cohort-step gain: SI → 1st in 2023/24 (53 → 58, +5).
Largest cohort-step loss: JI → SI in 2022/23 (55 → 53, -2).
Overall: 370 (1975/76) → 437 (2025/26), 67.
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
41
55
46.8
6
Senior Infants
43
56
49.2
6
1st Class
45
58
52.8
6
2nd Class
47
63
54.7
6
3rd Class
51
66
59.7
6
4th Class
50
67
58.7
6
5th Class
51
67
60.5
6
6th Class
54
65
60.0
6
Total
370
802
479.3
41
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).