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
21.92
2025/26
Mainstream classes
26
2025/26
Largest class group
27
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
840
29
28.97
34
8
2007/08
848
30
28.27
30
10
2008/09
817
30
27.23
31
8
2009/10
817
30
27.23
31
8
2010/11
802
29
27.66
32
11
2011/12
794
29
27.38
32
9
2012/13
783
28
27.96
32
11
2013/14
796
28
28.43
32
14
2014/15
825
29
28.45
33
13
2015/16
824
30
27.47
34
6
2016/17
817
30
27.23
33
7
2017/18
799
30
26.63
33
6
2019/20
741
30
24.70
32
3
2020/21
711
29
24.52
30
2
2021/22
683
28
24.39
30
1
2022/23
633
28
22.61
30
1
2023/24
609
27
22.56
30
2
2024/25
586
26
22.54
31
2
2025/26
570
26
21.92
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1998/99: 758 in 1997/98 → 800, +42 pupils.
Biggest loss in a single year: 2022/23: 689 in 2021/22 → 645, -44 pupils.
Largest single-class increase: Junior Infants in 2025/26 (57 → 75, +18).
Largest single-class decrease: Senior Infants in 2025/26 (80 → 55, -25).
Largest cohort-step gain: 1st → 2nd in 2024/25 (71 → 75, +4).
Largest cohort-step loss: 2nd → 3rd in 2025/26 (75 → 72, -3).
Overall: 618 (1975/76) → 581 (2025/26), -37.
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
57
76
70.8
6
Senior Infants
55
80
70.5
6
1st Class
71
82
74.2
6
2nd Class
72
89
76.3
6
3rd Class
72
93
78.5
6
4th Class
72
100
83.7
6
5th Class
74
108
90.2
6
6th Class
74
111
96.0
6
Total
581
853
737.1
40
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).