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
24.95
2025/26
Mainstream classes
20
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
6
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
516
19
27.16
31
5
2007/08
521
19
27.42
31
4
2008/09
520
19
27.37
30
4
2009/10
519
19
27.32
30
4
2010/11
515
19
27.11
30
5
2011/12
516
19
27.16
31
5
2012/13
515
19
27.11
31
6
2013/14
548
20
27.40
32
5
2014/15
544
20
27.20
31
3
2015/16
545
20
27.25
31
4
2016/17
546
20
27.30
30
3
2017/18
550
20
27.50
30
4
2019/20
536
20
26.80
30
5
2020/21
531
20
26.55
30
6
2021/22
526
20
26.30
30
6
2022/23
533
20
26.65
30
8
2023/24
541
20
27.05
30
8
2024/25
509
20
25.45
30
7
2025/26
499
20
24.95
30
6
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 314 in 1983/84 → 499, +185 pupils.
Biggest loss in a single year: 1979/80: 360 in 1977/78 → 309, -51 pupils.
Largest single-class increase: 5th Class in 2022/23 (60 → 90, +30).
Largest single-class decrease: 5th Class in 2023/24 (90 → 60, -30).
Largest cohort-step gain: 4th → 5th in 2024/25 (81 → 87, +6).
Largest cohort-step loss: JI → SI in 2021/22 (58 → 55, -3).
Overall: 364 (1974/75) → 499 (2025/26), 135.
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
43
65
55.2
6
Senior Infants
44
67
57.7
6
1st Class
58
74
64.7
6
2nd Class
59
76
65.2
6
3rd Class
60
84
69.8
6
4th Class
60
87
68.0
6
5th Class
60
90
69.8
6
6th Class
60
89
72.8
6
Total
300
594
494.8
42
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).