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
21.53
2025/26
Mainstream classes
15
2025/26
Largest class group
31
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
645
24
26.88
36
4
2007/08
606
25
24.24
31
1
2008/09
585
23
25.43
31
4
2009/10
537
22
24.41
30
1
2010/11
513
20
25.65
33
3
2011/12
491
19
25.84
32
3
2012/13
479
19
25.21
31
2
2013/14
447
18
24.83
28
0
2014/15
424
17
24.94
31
2
2015/16
392
17
23.06
27
0
2016/17
369
16
23.06
27
0
2017/18
354
15
23.60
32
1
2019/20
363
15
24.20
31
1
2020/21
354
15
23.60
31
1
2021/22
336
15
22.40
30
1
2022/23
338
15
22.53
27
0
2023/24
327
15
21.80
31
2
2024/25
334
15
22.27
29
0
2025/26
323
15
21.53
31
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1979/80: 651 in 1977/78 → 752, +101 pupils.
Biggest loss in a single year: 1993/94: 796 in 1982/83 → 590, -206 pupils.
Largest single-class increase: 6th Class in 2022/23 (30 → 53, +23).
Largest single-class decrease: 6th Class in 2021/22 (52 → 30, -22).
Largest cohort-step gain: 1st → 2nd in 2025/26 (29 → 40, +11).
Largest cohort-step loss: 4th → 5th in 2021/22 (57 → 52, -5).
Overall: 604 (1975/76) → 353 (2025/26), -251.
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
31
45
39.0
6
Senior Infants
29
51
41.0
6
1st Class
29
47
40.2
6
2nd Class
39
48
42.5
6
3rd Class
36
50
43.7
6
4th Class
37
57
46.8
6
5th Class
31
57
43.5
6
6th Class
30
53
44.2
6
Total
353
796
535.7
40
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).