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
24.07
2025/26
Mainstream classes
29
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
679
24
28.29
31
10
2007/08
701
25
28.04
31
9
2008/09
693
26
26.65
31
6
2009/10
721
25
28.84
31
9
2010/11
717
26
27.58
31
6
2011/12
713
26
27.42
31
8
2012/13
728
26
28.00
31
9
2013/14
725
26
27.88
30
5
2014/15
758
27
28.07
30
8
2015/16
747
26
28.73
30
7
2016/17
744
27
27.56
30
5
2017/18
779
28
27.82
31
9
2019/20
750
28
26.79
31
3
2020/21
752
28
26.86
31
4
2021/22
736
28
26.29
30
1
2022/23
720
28
25.71
30
1
2023/24
720
29
24.83
29
0
2024/25
708
29
24.41
29
0
2025/26
698
29
24.07
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2017/18: 744 in 2016/17 → 779, +35 pupils.
Biggest loss in a single year: 1993/94: 639 in 1983/84 → 571, -68 pupils.
Largest single-class increase: 6th Class in 2021/22 (91 → 118, +27).
Largest single-class decrease: 5th Class in 2021/22 (119 → 88, -31).
Largest cohort-step gain: 1st → 2nd in 2025/26 (92 → 96, +4).
Largest cohort-step loss: SI → 1st in 2024/25 (99 → 92, -7).
Overall: 620 (1979/80) → 698 (2025/26), 78.
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
75
102
89.2
6
Senior Infants
73
101
86.2
6
1st Class
79
96
86.2
6
2nd Class
82
107
91.7
6
3rd Class
82
106
89.0
6
4th Class
82
105
89.3
6
5th Class
83
119
94.7
6
6th Class
84
118
96.2
6
Total
548
779
669.4
38
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).