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
31
2025/26
Classes with 30+ pupils
4
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
479
17
28.18
30
6
2007/08
476
18
26.44
30
4
2008/09
473
18
26.28
30
5
2009/10
473
17
27.82
30
3
2010/11
479
17
28.18
31
5
2011/12
478
17
28.12
31
7
2012/13
466
17
27.41
31
7
2013/14
471
17
27.71
32
5
2014/15
461
17
27.12
32
5
2015/16
453
17
26.65
31
4
2016/17
455
17
26.76
32
5
2017/18
448
17
26.35
32
3
2019/20
438
17
25.76
30
2
2020/21
433
17
25.47
30
2
2021/22
414
17
24.35
29
0
2022/23
423
17
24.88
30
1
2023/24
405
17
23.82
30
1
2024/25
406
16
25.38
31
4
2025/26
406
16
25.38
31
4
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1980/81: 661 in 1979/80 → 733, +72 pupils.
Biggest loss in a single year: 1983/84: 714 in 1982/83 → 595, -119 pupils.
Largest single-class increase: 5th Class in 2024/25 (43 → 61, +18).
Largest single-class decrease: Junior Infants in 2023/24 (54 → 31, -23).
Largest cohort-step gain: 4th → 5th in 2024/25 (56 → 61, +5).
Largest cohort-step loss: 3rd → 4th in 2025/26 (54 → 51, -3).
Overall: 626 (1974/75) → 406 (2025/26), -220.
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
54
44.5
6
Senior Infants
35
59
47.8
6
1st Class
38
58
51.5
6
2nd Class
44
57
53.0
6
3rd Class
42
57
52.5
6
4th Class
43
61
53.5
6
5th Class
43
61
55.2
6
6th Class
47
61
56.5
6
Total
405
733
511.0
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).