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
22.08
2025/26
Mainstream classes
13
2025/26
Largest class group
25
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
166
6
27.67
33
3
2007/08
190
7
27.14
32
3
2008/09
207
7
29.57
33
4
2009/10
226
8
28.25
29
0
2010/11
254
9
28.22
36
2
2011/12
270
9
30.00
37
5
2012/13
291
10
29.10
36
6
2013/14
327
12
27.25
37
5
2014/15
334
12
27.83
34
4
2015/16
343
12
28.58
34
5
2016/17
372
13
28.62
35
7
2017/18
391
14
27.93
35
4
2019/20
392
15
26.13
34
3
2020/21
375
15
25.00
34
1
2021/22
354
15
23.60
29
0
2022/23
357
14
25.50
35
4
2023/24
327
15
21.80
32
2
2024/25
304
14
21.71
31
1
2025/26
287
13
22.08
25
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2013/14: 291 in 2012/13 → 327, +36 pupils.
Biggest loss in a single year: 1993/94: 130 in 1983/84 → 105, -25 pupils.
Largest single-class increase: 5th Class in 2021/22 (38 → 53, +15).
Largest single-class decrease: 2nd Class in 2021/22 (52 → 34, -18).
Largest cohort-step gain: 4th → 5th in 2025/26 (47 → 51, +4).
Largest cohort-step loss: SI → 1st in 2022/23 (42 → 41, -1).
Overall: 120 (1974/75) → 299 (2025/26), 179.
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
29
41
33.8
6
Senior Infants
29
48
37.5
6
1st Class
29
48
36.7
6
2nd Class
34
52
41.2
6
3rd Class
34
55
44.0
6
4th Class
34
57
47.3
6
5th Class
36
60
48.5
6
6th Class
38
60
49.7
6
Total
95
392
205.1
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).