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
27.96
2025/26
Mainstream classes
24
2025/26
Largest class group
31
2025/26
Classes with 30+ pupils
7
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
302
11
27.45
34
5
2007/08
335
12
27.92
33
4
2008/09
376
14
26.86
33
3
2009/10
392
14
28.00
33
5
2010/11
464
17
27.29
32
5
2011/12
493
18
27.39
32
6
2012/13
549
20
27.45
31
5
2013/14
601
22
27.32
31
7
2014/15
634
23
27.57
32
6
2015/16
628
23
27.30
31
6
2016/17
663
24
27.62
31
8
2017/18
701
24
29.21
31
15
2019/20
708
24
29.50
31
17
2020/21
699
24
29.12
32
16
2021/22
689
24
28.71
31
15
2022/23
685
24
28.54
31
14
2023/24
718
24
29.92
31
18
2024/25
699
24
29.12
31
14
2025/26
671
24
27.96
31
7
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1975/76: 416 in 1974/75 → 565, +149 pupils.
Biggest loss in a single year: 1993/94: 728 in 1983/84 → 274, -454 pupils.
Largest single-class increase: 6th Class in 2023/24 (61 → 92, +31).
Largest single-class decrease: 6th Class in 2022/23 (93 → 61, -32).
Largest cohort-step gain: 3rd → 4th in 2023/24 (76 → 85, +9).
Largest cohort-step loss: JI → SI in 2024/25 (83 → 80, -3).
Overall: 416 (1974/75) → 671 (2025/26), 255.
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
72
93
85.0
6
Senior Infants
79
93
87.3
6
1st Class
74
93
85.8
6
2nd Class
76
93
88.7
6
3rd Class
76
93
88.5
6
4th Class
62
93
84.7
6
5th Class
62
92
85.7
6
6th Class
61
105
87.8
6
Total
191
766
493.7
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).