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
25.38
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
126
5
25.20
28
0
2007/08
159
6
26.50
34
1
2008/09
173
6
28.83
36
2
2009/10
205
7
29.29
32
3
2010/11
249
9
27.67
32
3
2011/12
282
10
28.20
30
4
2012/13
316
11
28.73
31
4
2013/14
336
12
28.00
30
3
2014/15
370
13
28.46
30
6
2015/16
397
14
28.36
30
5
2016/17
412
15
27.47
30
1
2017/18
447
16
27.94
30
2
2019/20
400
16
25.00
29
0
2020/21
407
16
25.44
29
0
2021/22
415
16
25.94
29
0
2022/23
413
16
25.81
29
0
2023/24
426
16
26.62
29
0
2024/25
412
16
25.75
28
0
2025/26
406
16
25.38
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2010/11: 205 in 2009/10 → 249, +44 pupils.
Biggest loss in a single year: 2018/19: 447 in 2017/18 → 422, -25 pupils.
Largest single-class increase: Senior Infants in 2021/22 (41 → 58, +17).
Largest single-class decrease: Senior Infants in 2022/23 (58 → 42, -16).
Largest cohort-step gain: 2nd → 3rd in 2023/24 (47 → 54, +7).
Largest cohort-step loss: JI → SI in 2024/25 (53 → 50, -3).
Overall: 20 (2003/04) → 406 (2025/26), 386.
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
42
54
49.3
6
Senior Infants
41
58
48.8
6
1st Class
43
57
49.3
6
2nd Class
47
56
50.3
6
3rd Class
47
55
52.3
6
4th Class
52
57
54.0
6
5th Class
51
56
53.8
6
6th Class
53
56
55.2
6
Total
20
447
301.4
23
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).