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
24.69
2025/26
Mainstream classes
29
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
1
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
620
23
26.96
34
1
2007/08
651
25
26.04
33
7
2008/09
661
25
26.44
31
4
2009/10
673
25
26.92
32
6
2010/11
663
25
26.52
32
4
2011/12
669
25
26.76
34
5
2012/13
683
25
27.32
31
7
2013/14
673
26
25.88
32
8
2014/15
681
25
27.24
33
7
2015/16
695
26
26.73
32
6
2016/17
688
27
25.48
29
0
2017/18
711
27
26.33
34
5
2019/20
717
29
24.72
34
3
2020/21
718
28
25.64
33
6
2021/22
736
28
26.29
33
9
2022/23
735
28
26.25
33
8
2023/24
732
29
25.24
32
6
2024/25
727
29
25.07
31
6
2025/26
716
29
24.69
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2006/07: 628 in 2005/06 → 666, +38 pupils.
Biggest loss in a single year: 1994/95: 572 in 1993/94 → 549, -23 pupils.
Largest single-class increase: 4th Class in 2025/26 (75 → 115, +40).
Largest single-class decrease: 3rd Class in 2023/24 (110 → 73, -37).
Largest cohort-step gain: 4th → 5th in 2025/26 (75 → 89, +14).
Largest cohort-step loss: 4th → 5th in 2023/24 (94 → 91, -3).
Overall: 572 (1993/94) → 778 (2025/26), 206.
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
74
93
85.0
6
Senior Infants
71
96
85.5
6
1st Class
72
107
91.3
6
2nd Class
75
107
92.7
6
3rd Class
73
110
94.2
6
4th Class
75
115
98.3
6
5th Class
87
115
95.7
6
6th Class
79
119
95.0
6
Total
542
793
673.8
33
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).