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
24.88
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
152
6
25.33
29
0
2007/08
174
7
24.86
28
0
2008/09
204
8
25.50
31
2
2009/10
222
8
27.75
31
2
2010/11
220
8
27.50
31
1
2011/12
222
8
27.75
31
2
2012/13
225
8
28.12
31
5
2013/14
225
8
28.12
30
3
2014/15
225
8
28.12
30
1
2015/16
230
8
28.75
32
2
2016/17
257
9
28.56
34
2
2017/18
278
10
27.80
30
1
2019/20
329
13
25.31
29
0
2020/21
355
13
27.31
28
0
2021/22
357
14
25.50
28
0
2022/23
381
15
25.40
27
0
2023/24
405
16
25.31
27
0
2024/25
400
16
25.00
27
0
2025/26
398
16
24.88
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2005/06: 85 in 2004/05 → 124, +39 pupils.
Biggest loss in a single year: 2024/25: 417 in 2023/24 → 412, -5 pupils.
Largest single-class increase: 5th Class in 2022/23 (26 → 47, +21).
Largest single-class decrease: 2nd Class in 2021/22 (56 → 50, -6).
Largest cohort-step gain: 2nd → 3rd in 2025/26 (51 → 54, +3).
Largest cohort-step loss: SI → 1st in 2021/22 (56 → 51, -5).
Overall: 28 (2002/03) → 410 (2025/26), 382.
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
44
54
50.3
6
Senior Infants
46
56
50.2
6
1st Class
49
53
51.0
6
2nd Class
50
56
52.5
6
3rd Class
51
54
52.7
6
4th Class
28
53
47.2
6
5th Class
26
53
42.7
6
6th Class
26
54
38.3
6
Total
28
417
251.2
24
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).