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
24.08
2025/26
Mainstream classes
24
2025/26
Largest class group
27
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
545
20
27.25
32
6
2007/08
547
20
27.35
32
5
2008/09
546
20
27.30
33
3
2009/10
544
20
27.20
33
6
2010/11
552
20
27.60
33
6
2011/12
553
20
27.65
33
6
2012/13
582
20
29.10
37
7
2013/14
603
21
28.71
32
10
2014/15
622
22
28.27
32
7
2015/16
656
24
27.33
32
7
2016/17
669
24
27.88
32
4
2017/18
660
24
27.50
32
3
2019/20
631
24
26.29
31
1
2020/21
630
24
26.25
31
1
2021/22
610
24
25.42
29
0
2022/23
589
24
24.54
28
0
2023/24
577
24
24.04
28
0
2024/25
578
24
24.08
28
0
2025/26
578
24
24.08
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2015/16: 622 in 2014/15 → 656, +34 pupils.
Biggest loss in a single year: 2019/20: 659 in 2018/19 → 631, -28 pupils.
Largest single-class increase: 1st Class in 2022/23 (68 → 82, +14).
Largest single-class decrease: Junior Infants in 2021/22 (82 → 71, -11).
Largest cohort-step gain: JI → SI in 2022/23 (71 → 75, +4).
Largest cohort-step loss: 1st → 2nd in 2025/26 (65 → 60, -5).
Overall: 506 (1993/94) → 578 (2025/26), 72.
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
66
83
75.8
6
Senior Infants
68
81
74.8
6
1st Class
65
82
72.5
6
2nd Class
60
81
71.2
6
3rd Class
68
78
72.8
6
4th Class
68
84
74.0
6
5th Class
68
86
74.8
6
6th Class
68
86
77.7
6
Total
500
669
568.6
33
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).