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
25.62
2025/26
Mainstream classes
16
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
1
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
341
12
28.42
34
5
2007/08
384
14
27.43
34
5
2008/09
415
16
25.94
33
4
2009/10
428
16
26.75
31
4
2010/11
439
17
25.82
31
3
2011/12
447
17
26.29
31
5
2012/13
431
17
25.35
31
2
2013/14
420
17
24.71
28
0
2014/15
429
17
25.24
30
1
2015/16
421
16
26.31
30
3
2016/17
435
16
27.19
31
5
2017/18
435
16
27.19
32
4
2019/20
440
16
27.50
31
4
2020/21
429
16
26.81
30
1
2021/22
435
16
27.19
30
1
2022/23
431
16
26.94
29
0
2023/24
421
16
26.31
29
0
2024/25
419
16
26.19
30
1
2025/26
410
16
25.62
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1977/78: 196 in 1976/77 → 244, +48 pupils.
Biggest loss in a single year: 1993/94: 328 in 1982/83 → 289, -39 pupils.
Largest single-class increase: Senior Infants in 2023/24 (48 → 57, +9).
Largest single-class decrease: 6th Class in 2023/24 (56 → 46, -10).
Largest cohort-step gain: JI → SI in 2025/26 (47 → 52, +5).
Largest cohort-step loss: 4th → 5th in 2022/23 (58 → 51, -7).
Overall: 170 (1975/76) → 422 (2025/26), 252.
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
47
57
49.8
6
Senior Infants
48
57
51.8
6
1st Class
48
57
53.3
6
2nd Class
49
57
53.8
6
3rd Class
49
57
54.3
6
4th Class
52
59
55.8
6
5th Class
51
59
55.3
6
6th Class
46
56
51.8
6
Total
170
453
350.8
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).