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
22.83
2025/26
Mainstream classes
18
2025/26
Largest class group
29
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
313
11
28.45
35
5
2007/08
328
13
25.23
33
3
2008/09
376
15
25.07
32
1
2009/10
375
14
26.79
31
5
2010/11
395
15
26.33
33
4
2011/12
421
15
28.07
33
6
2012/13
453
16
28.31
34
7
2013/14
486
18
27.00
34
4
2014/15
500
19
26.32
34
4
2015/16
514
19
27.05
35
6
2016/17
547
20
27.35
35
4
2017/18
518
21
24.67
34
2
2019/20
523
20
26.15
32
3
2020/21
499
20
24.95
31
2
2021/22
471
20
23.55
29
0
2022/23
481
20
24.05
30
1
2023/24
460
20
23.00
31
2
2024/25
425
19
22.37
30
1
2025/26
411
18
22.83
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 227 in 1982/83 → 341, +114 pupils.
Biggest loss in a single year: 1982/83: 282 in 1981/82 → 227, -55 pupils.
Largest single-class increase: 5th Class in 2022/23 (62 → 87, +25).
Largest single-class decrease: 5th Class in 2023/24 (87 → 48, -39).
Largest cohort-step gain: JI → SI in 2022/23 (47 → 54, +7).
Largest cohort-step loss: SI → 1st in 2021/22 (61 → 54, -7).
Overall: 268 (1975/76) → 423 (2025/26), 155.
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
43
60
51.2
6
Senior Infants
48
61
54.0
6
1st Class
48
54
51.3
6
2nd Class
43
57
51.7
6
3rd Class
44
81
56.8
6
4th Class
51
82
60.8
6
5th Class
48
87
65.7
6
6th Class
52
86
68.5
6
Total
227
557
367.6
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).