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
18.79
2025/26
Mainstream classes
19
2025/26
Largest class group
24
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+
2007/08
78
4
19.50
23
0
2008/09
169
9
18.78
22
0
2009/10
269
13
20.69
24
0
2010/11
339
15
22.60
24
0
2011/12
378
16
23.62
26
0
2012/13
409
17
24.06
26
0
2013/14
396
17
23.29
24
0
2014/15
376
18
20.89
25
0
2015/16
390
18
21.67
24
0
2016/17
380
18
21.11
25
0
2017/18
380
19
20.00
25
0
2019/20
387
19
20.37
25
0
2020/21
384
19
20.21
25
0
2021/22
385
19
20.26
25
0
2022/23
379
19
19.95
25
0
2023/24
376
19
19.79
25
0
2024/25
365
19
19.21
24
0
2025/26
357
19
18.79
24
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2009/10: 169 in 2008/09 → 269, +100 pupils.
Biggest loss in a single year: 2014/15: 403 in 2013/14 → 388, -15 pupils.
Largest single-class increase: Junior Infants in 2023/24 (46 → 63, +17).
Largest single-class decrease: Junior Infants in 2024/25 (63 → 43, -20).
Largest cohort-step gain: 3rd → 4th in 2025/26 (39 → 43, +4).
Largest cohort-step loss: SI → 1st in 2022/23 (47 → 41, -6).
Overall: 78 (2007/08) → 375 (2025/26), 297.
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
63
47.2
6
Senior Infants
45
59
48.8
6
1st Class
41
61
47.5
6
2nd Class
40
48
45.0
6
3rd Class
39
49
45.3
6
4th Class
43
62
48.8
6
5th Class
45
62
49.2
6
6th Class
45
60
49.5
6
Total
78
412
357.9
19
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).