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
23.12
2025/26
Mainstream classes
16
2025/26
Largest class group
27
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
241
9
26.78
33
4
2007/08
259
9
28.78
33
4
2008/09
281
10
28.10
34
4
2009/10
296
10
29.60
34
6
2010/11
296
11
26.91
34
3
2011/12
297
11
27.00
32
1
2012/13
314
11
28.55
32
4
2013/14
326
12
27.17
31
5
2014/15
332
12
27.67
33
5
2015/16
347
12
28.92
34
6
2016/17
362
13
27.85
31
5
2017/18
372
14
26.57
30
2
2019/20
398
15
26.53
31
3
2020/21
384
15
25.60
30
1
2021/22
384
15
25.60
33
3
2022/23
394
16
24.62
28
0
2023/24
389
16
24.31
28
0
2024/25
387
16
24.19
28
0
2025/26
370
16
23.12
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 126 in 1982/83 → 167, +41 pupils.
Biggest loss in a single year: 2020/21: 398 in 2019/20 → 384, -14 pupils.
Largest single-class increase: Junior Infants in 2022/23 (40 → 52, +12).
Largest single-class decrease: 1st Class in 2022/23 (54 → 39, -15).
Largest cohort-step gain: 1st → 2nd in 2023/24 (39 → 42, +3).
Largest cohort-step loss: JI → SI in 2021/22 (41 → 40, -1).
Overall: 101 (1974/75) → 380 (2025/26), 279.
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
40
52
43.8
6
Senior Infants
40
54
46.5
6
1st Class
39
54
47.5
6
2nd Class
42
54
48.8
6
3rd Class
42
55
49.7
6
4th Class
44
54
50.3
6
5th Class
46
53
50.7
6
6th Class
41
53
49.0
6
Total
101
398
246.0
42
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).