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
22.47
2025/26
Mainstream classes
30
2025/26
Largest class group
28
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
769
28
27.46
33
8
2007/08
771
29
26.59
30
2
2008/09
765
29
26.38
30
2
2009/10
754
28
26.93
33
3
2010/11
761
28
27.18
34
3
2011/12
750
28
26.79
33
2
2012/13
769
28
27.46
33
5
2013/14
795
29
27.41
33
5
2014/15
796
29
27.45
31
2
2015/16
799
29
27.55
31
3
2016/17
797
30
26.57
29
0
2017/18
827
30
27.57
33
3
2019/20
778
31
25.10
29
0
2020/21
764
30
25.47
32
2
2021/22
739
30
24.63
31
3
2022/23
739
30
24.63
33
2
2023/24
696
31
22.45
29
0
2024/25
709
29
24.45
29
0
2025/26
674
30
22.47
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1983/84: 864 in 1982/83 → 948, +84 pupils.
Biggest loss in a single year: 2000/01: 871 in 1999/00 → 802, -69 pupils.
Largest single-class increase: 1st Class in 2025/26 (58 → 87, +29).
Largest single-class decrease: Junior Infants in 2025/26 (126 → 76, -50).
Largest cohort-step gain: JI → SI in 2024/25 (112 → 120, +8).
Largest cohort-step loss: SI → 1st in 2021/22 (145 → 76, -69).
Overall: 896 (1974/75) → 680 (2025/26), -216.
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
76
135
114.8
6
Senior Infants
105
145
127.2
6
1st Class
58
87
77.0
6
2nd Class
59
83
76.2
6
3rd Class
73
85
80.5
6
4th Class
79
92
83.5
6
5th Class
68
92
81.5
6
6th Class
65
93
80.5
6
Total
680
948
817.0
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).