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
21.92
2025/26
Mainstream classes
13
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
383
14
27.36
35
6
2007/08
397
14
28.36
33
7
2008/09
400
15
26.67
32
4
2009/10
412
14
29.43
34
8
2010/11
397
15
26.47
34
2
2011/12
389
15
25.93
31
2
2012/13
387
14
27.64
35
5
2013/14
382
14
27.29
36
3
2014/15
367
14
26.21
34
5
2015/16
373
14
26.64
33
4
2016/17
378
14
27.00
33
4
2017/18
354
15
23.60
31
1
2019/20
358
14
25.57
31
2
2020/21
349
16
21.81
29
0
2021/22
327
16
20.44
30
1
2022/23
320
15
21.33
28
0
2023/24
317
14
22.64
27
0
2024/25
295
14
21.07
27
0
2025/26
285
13
21.92
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1975/76: 336 in 1974/75 → 380, +44 pupils.
Biggest loss in a single year: 1993/94: 529 in 1983/84 → 399, -130 pupils.
Largest single-class increase: 3rd Class in 2023/24 (42 → 54, +12).
Largest single-class decrease: 3rd Class in 2024/25 (54 → 34, -20).
Largest cohort-step gain: 1st → 2nd in 2025/26 (31 → 36, +5).
Largest cohort-step loss: JI → SI in 2024/25 (34 → 30, -4).
Overall: 336 (1974/75) → 304 (2025/26), -32.
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
31
35
33.5
6
Senior Infants
30
45
35.3
6
1st Class
31
45
36.5
6
2nd Class
34
49
38.7
6
3rd Class
33
54
41.3
6
4th Class
35
52
43.2
6
5th Class
37
53
44.8
6
6th Class
36
55
45.8
6
Total
304
529
392.5
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).