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
19.80
2025/26
Mainstream classes
20
2025/26
Largest class group
25
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
414
16
25.88
33
4
2007/08
487
19
25.63
30
1
2008/09
540
22
24.55
30
1
2009/10
547
23
23.78
31
3
2010/11
497
23
21.61
31
3
2011/12
520
19
27.37
35
6
2012/13
520
19
27.37
35
4
2013/14
486
19
25.58
32
3
2014/15
477
19
25.11
30
2
2015/16
453
18
25.17
31
3
2016/17
433
17
25.47
31
5
2017/18
417
16
26.06
32
5
2019/20
424
16
26.50
34
7
2020/21
422
16
26.38
34
6
2021/22
399
16
24.94
35
2
2022/23
407
17
23.94
27
0
2023/24
410
17
24.12
28
0
2024/25
408
20
20.40
25
0
2025/26
396
20
19.80
25
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1975/76: 780 in 1974/75 → 857, +77 pupils.
Biggest loss in a single year: 1993/94: 515 in 1983/84 → 414, -101 pupils.
Largest single-class increase: 2nd Class in 2022/23 (41 → 54, +13).
Largest single-class decrease: 4th Class in 2021/22 (66 → 50, -16).
Largest cohort-step gain: 3rd → 4th in 2024/25 (52 → 63, +11).
Largest cohort-step loss: 4th → 5th in 2021/22 (66 → 60, -6).
Overall: 780 (1974/75) → 414 (2025/26), -366.
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
38
48
43.5
6
Senior Infants
39
53
46.2
6
1st Class
38
52
46.5
6
2nd Class
41
54
46.7
6
3rd Class
46
56
50.8
6
4th Class
50
66
57.3
6
5th Class
51
66
58.3
6
6th Class
59
69
63.2
6
Total
274
857
469.3
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).