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
21.12
2025/26
Mainstream classes
16
2025/26
Largest class group
30
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
200
7
28.57
33
2
2007/08
212
8
26.50
30
1
2008/09
217
9
24.11
28
0
2009/10
218
9
24.22
29
0
2010/11
212
9
23.56
27
0
2011/12
245
9
27.22
30
3
2012/13
239
10
23.90
30
1
2013/14
233
9
25.89
31
1
2014/15
246
9
27.33
30
1
2015/16
277
10
27.70
33
4
2016/17
284
11
25.82
31
3
2017/18
296
11
26.91
33
5
2019/20
323
13
24.85
33
2
2020/21
317
13
24.38
29
0
2021/22
324
13
24.92
33
1
2022/23
387
14
27.64
33
5
2023/24
387
16
24.19
31
3
2024/25
391
16
24.44
30
3
2025/26
338
16
21.12
30
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2022/23: 342 in 2021/22 → 412, +70 pupils.
Biggest loss in a single year: 1993/94: 621 in 1983/84 → 451, -170 pupils.
Largest single-class increase: 6th Class in 2022/23 (29 → 63, +34).
Largest single-class decrease: 6th Class in 2023/24 (63 → 30, -33).
Largest cohort-step gain: 5th → 6th in 2022/23 (52 → 63, +11).
Largest cohort-step loss: 1st → 2nd in 2024/25 (55 → 50, -5).
Overall: 765 (1974/75) → 362 (2025/26), -403.
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
26
47
36.3
6
Senior Infants
30
47
39.7
6
1st Class
32
55
44.3
6
2nd Class
41
51
47.3
6
3rd Class
29
58
48.7
6
4th Class
33
61
51.0
6
5th Class
29
58
47.0
6
6th Class
29
63
48.7
6
Total
184
765
392.7
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).