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
23.38
2025/26
Mainstream classes
26
2025/26
Largest class group
26
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
516
19
27.16
31
3
2007/08
536
20
26.80
30
2
2008/09
529
21
25.19
29
0
2009/10
581
21
27.67
32
6
2010/11
592
21
28.19
32
6
2011/12
622
22
28.27
31
8
2012/13
653
23
28.39
33
7
2013/14
699
24
29.12
34
13
2014/15
704
25
28.16
33
9
2015/16
703
25
28.12
33
9
2016/17
693
26
26.65
31
3
2017/18
687
26
26.42
32
8
2019/20
705
26
27.12
31
9
2020/21
659
26
25.35
31
4
2021/22
628
26
24.15
31
4
2022/23
638
26
24.54
31
3
2023/24
640
26
24.62
27
0
2024/25
627
26
24.12
27
0
2025/26
608
26
23.38
26
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 520 in 1983/84 → 605, +85 pupils.
Biggest loss in a single year: 1979/80: 610 in 1978/79 → 547, -63 pupils.
Largest single-class increase: Junior Infants in 2022/23 (58 → 71, +13).
Largest single-class decrease: 2nd Class in 2021/22 (90 → 75, -15).
Largest cohort-step gain: SI → 1st in 2023/24 (67 → 77, +10).
Largest cohort-step loss: 4th → 5th in 2021/22 (89 → 85, -4).
Overall: 732 (1974/75) → 620 (2025/26), -112.
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
58
71
64.0
6
Senior Infants
65
72
69.0
6
1st Class
70
77
73.7
6
2nd Class
71
90
78.0
6
3rd Class
74
92
81.3
6
4th Class
79
92
84.5
6
5th Class
83
96
89.5
6
6th Class
86
104
95.3
6
Total
484
732
607.8
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).