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
23.73
2025/26
Mainstream classes
15
2025/26
Largest class group
32
2025/26
Classes with 30+ pupils
1
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
308
11
28.00
40
5
2007/08
313
11
28.45
41
5
2008/09
331
12
27.58
39
4
2009/10
341
12
28.42
34
6
2010/11
347
14
24.79
32
3
2011/12
384
14
27.43
34
5
2012/13
384
14
27.43
34
4
2013/14
383
14
27.36
31
4
2014/15
374
14
26.71
34
4
2015/16
378
14
27.00
34
5
2016/17
372
14
26.57
37
3
2017/18
392
15
26.13
34
2
2019/20
361
14
25.79
33
3
2020/21
366
14
26.14
32
2
2021/22
366
15
24.40
34
1
2022/23
357
15
23.80
34
1
2023/24
360
15
24.00
35
1
2024/25
350
15
23.33
33
1
2025/26
356
15
23.73
32
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 170 in 1982/83 → 277, +107 pupils.
Biggest loss in a single year: 2018/19: 392 in 2017/18 → 371, -21 pupils.
Largest single-class increase: 5th Class in 2025/26 (33 → 54, +21).
Largest single-class decrease: 4th Class in 2022/23 (53 → 37, -16).
Largest cohort-step gain: 4th → 5th in 2025/26 (47 → 54, +7).
Largest cohort-step loss: SI → 1st in 2022/23 (47 → 45, -2).
Overall: 98 (1975/76) → 362 (2025/26), 264.
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
35
49
43.3
6
Senior Infants
40
50
45.5
6
1st Class
34
48
44.0
6
2nd Class
34
49
43.7
6
3rd Class
34
53
45.3
6
4th Class
35
53
45.5
6
5th Class
33
55
46.7
6
6th Class
32
56
46.2
6
Total
98
392
289.3
41
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).