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
27.09
2025/26
Mainstream classes
32
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
523
18
29.06
30
4
2007/08
602
21
28.67
30
4
2008/09
684
24
28.50
31
3
2009/10
740
26
28.46
31
16
2010/11
735
26
28.27
30
12
2011/12
770
26
29.62
31
16
2012/13
764
26
29.38
30
15
2013/14
736
25
29.44
30
14
2014/15
729
25
29.16
30
11
2015/16
728
25
29.12
30
12
2016/17
737
25
29.48
30
15
2017/18
771
26
29.65
30
20
2019/20
804
28
28.71
30
7
2020/21
835
29
28.79
30
7
2021/22
850
30
28.33
30
2
2022/23
853
30
28.43
30
4
2023/24
867
31
27.97
30
1
2024/25
891
32
27.84
29
0
2025/26
867
32
27.09
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2005/06: 293 in 2004/05 → 408, +115 pupils.
Biggest loss in a single year: 2013/14: 764 in 2012/13 → 736, -28 pupils.
Largest single-class increase: 6th Class in 2021/22 (86 → 113, +27).
Largest single-class decrease: 5th Class in 2021/22 (113 → 86, -27).
Largest cohort-step gain: 5th → 6th in 2024/25 (107 → 110, +3).
Largest cohort-step loss: 2nd → 3rd in 2021/22 (114 → 107, -7).
Overall: 45 (2001/02) → 867 (2025/26), 822.
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
101
120
112.2
6
Senior Infants
105
117
111.8
6
1st Class
107
117
112.7
6
2nd Class
109
117
112.5
6
3rd Class
86
116
106.8
6
4th Class
86
114
102.5
6
5th Class
86
115
102.7
6
6th Class
86
114
99.3
6
Total
45
891
654.7
25
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).