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
24.26
2025/26
Mainstream classes
19
2025/26
Largest class group
30
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
452
16
28.25
32
5
2007/08
450
17
26.47
32
4
2008/09
456
17
26.82
31
4
2009/10
466
16
29.12
32
6
2010/11
472
17
27.76
32
8
2011/12
481
17
28.29
34
10
2012/13
482
17
28.35
31
9
2013/14
482
17
28.35
33
7
2014/15
483
17
28.41
33
8
2015/16
499
17
29.35
32
10
2016/17
492
18
27.33
32
8
2017/18
497
18
27.61
32
10
2019/20
496
19
26.11
31
4
2020/21
482
19
25.37
31
4
2021/22
473
19
24.89
31
1
2022/23
484
19
25.47
30
2
2023/24
468
19
24.63
30
3
2024/25
465
19
24.47
30
3
2025/26
461
19
24.26
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1978/79: 62 in 1977/78 → 165, +103 pupils.
Biggest loss in a single year: 2003/04: 485 in 2002/03 → 454, -31 pupils.
Largest single-class increase: 3rd Class in 2022/23 (55 → 74, +19).
Largest single-class decrease: 4th Class in 2021/22 (74 → 53, -21).
Largest cohort-step gain: JI → SI in 2022/23 (56 → 60, +4).
Largest cohort-step loss: 3rd → 4th in 2023/24 (74 → 71, -3).
Overall: 62 (1977/78) → 461 (2025/26), 399.
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
53
56
55.2
6
Senior Infants
52
60
55.5
6
1st Class
53
70
58.0
6
2nd Class
56
70
58.7
6
3rd Class
54
74
58.7
6
4th Class
52
74
60.7
6
5th Class
52
74
61.8
6
6th Class
56
73
63.7
6
Total
62
563
456.7
39
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).