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
25.58
2025/26
Mainstream classes
26
2025/26
Largest class group
29
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
561
21
26.71
32
2
2007/08
575
21
27.38
30
3
2008/09
580
22
26.36
30
2
2009/10
582
21
27.71
33
7
2010/11
563
21
26.81
31
3
2011/12
574
21
27.33
30
3
2012/13
592
21
28.19
30
2
2013/14
638
22
29.00
30
7
2014/15
624
23
27.13
32
6
2015/16
671
24
27.96
32
6
2016/17
697
25
27.88
32
8
2017/18
707
26
27.19
31
4
2019/20
699
26
26.88
31
3
2020/21
699
26
26.88
31
3
2021/22
658
26
25.31
27
0
2022/23
647
26
24.88
30
1
2023/24
639
26
24.58
30
1
2024/25
641
26
24.65
29
0
2025/26
665
26
25.58
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2015/16: 624 in 2014/15 → 671, +47 pupils.
Biggest loss in a single year: 2021/22: 699 in 2020/21 → 658, -41 pupils.
Largest single-class increase: 5th Class in 2024/25 (80 → 99, +19).
Largest single-class decrease: 4th Class in 2021/22 (102 → 81, -21).
Largest cohort-step gain: 1st → 2nd in 2023/24 (78 → 88, +10).
Largest cohort-step loss: 1st → 2nd in 2021/22 (83 → 80, -3).
Overall: 522 (1974/75) → 665 (2025/26), 143.
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
63
78
72.8
6
Senior Infants
65
84
72.8
6
1st Class
70
83
74.7
6
2nd Class
71
88
79.3
6
3rd Class
74
88
80.8
6
4th Class
80
102
88.8
6
5th Class
80
101
89.7
6
6th Class
86
114
99.2
6
Total
466
717
576.8
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).