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
21.93
2025/26
Mainstream classes
28
2025/26
Largest class group
25
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
966
32
30.19
32
24
2007/08
874
32
27.31
31
2
2008/09
885
32
27.66
30
1
2009/10
883
32
27.59
29
0
2010/11
867
32
27.09
29
0
2011/12
885
32
27.66
29
0
2012/13
881
32
27.53
29
0
2013/14
858
32
26.81
28
0
2014/15
848
32
26.50
29
0
2015/16
834
32
26.06
28
0
2016/17
830
31
26.77
32
2
2017/18
824
31
26.58
32
2
2019/20
831
32
25.97
28
0
2020/21
783
32
24.47
28
0
2021/22
757
32
23.66
27
0
2022/23
714
32
22.31
27
0
2023/24
689
31
22.23
27
0
2024/25
643
30
21.43
26
0
2025/26
614
28
21.93
25
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 51 in 1983/84 → 803, +752 pupils.
Biggest loss in a single year: 2007/08: 972 in 2006/07 → 885, -87 pupils.
Largest single-class increase: 1st Class in 2025/26 (72 → 86, +14).
Largest single-class decrease: Senior Infants in 2025/26 (84 → 62, -22).
Largest cohort-step gain: JI → SI in 2021/22 (83 → 89, +6).
Largest cohort-step loss: SI → 1st in 2023/24 (77 → 72, -5).
Overall: 51 (1983/84) → 632 (2025/26), 581.
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
61
83
74.8
6
Senior Infants
62
97
80.2
6
1st Class
72
94
83.7
6
2nd Class
74
97
85.0
6
3rd Class
76
107
91.0
6
4th Class
84
106
94.7
6
5th Class
88
108
98.2
6
6th Class
90
108
100.0
6
Total
51
972
821.7
34
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).