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
24.50
2025/26
Mainstream classes
16
2025/26
Largest class group
28
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
325
12
27.08
35
4
2007/08
316
12
26.33
32
5
2008/09
314
12
26.17
33
4
2009/10
339
12
28.25
31
6
2010/11
340
12
28.33
31
6
2011/12
360
13
27.69
31
6
2012/13
375
13
28.85
31
6
2013/14
398
14
28.43
31
6
2014/15
415
15
27.67
31
5
2015/16
444
16
27.75
31
5
2016/17
438
16
27.38
31
3
2017/18
429
16
26.81
32
3
2019/20
402
16
25.12
31
1
2020/21
393
16
24.56
29
0
2021/22
366
16
22.88
29
0
2022/23
386
16
24.12
29
0
2023/24
386
16
24.12
28
0
2024/25
386
16
24.12
28
0
2025/26
392
16
24.50
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 161 in 1983/84 → 283, +122 pupils.
Biggest loss in a single year: 2021/22: 393 in 2020/21 → 366, -27 pupils.
Largest single-class increase: 6th Class in 2022/23 (43 → 58, +15).
Largest single-class decrease: 1st Class in 2021/22 (48 → 36, -12).
Largest cohort-step gain: 2nd → 3rd in 2022/23 (46 → 50, +4).
Largest cohort-step loss: SI → 1st in 2021/22 (39 → 36, -3).
Overall: 103 (1974/75) → 392 (2025/26), 289.
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
39
54
49.3
6
Senior Infants
39
54
47.3
6
1st Class
36
55
46.2
6
2nd Class
37
54
46.0
6
3rd Class
38
54
46.8
6
4th Class
41
58
49.5
6
5th Class
41
58
48.8
6
6th Class
43
58
50.8
6
Total
101
444
303.5
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).