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
24.22
2025/26
Mainstream classes
27
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
669
23
29.09
35
15
2007/08
689
25
27.56
31
12
2008/09
705
26
27.12
31
7
2009/10
710
25
28.40
31
11
2010/11
707
26
27.19
31
9
2011/12
712
26
27.38
31
9
2012/13
713
26
27.42
32
12
2013/14
705
26
27.12
31
14
2014/15
716
26
27.54
32
15
2015/16
712
26
27.38
32
10
2016/17
711
26
27.35
32
7
2017/18
709
27
26.26
31
5
2019/20
695
27
25.74
30
1
2020/21
683
27
25.30
29
0
2021/22
675
27
25.00
29
0
2022/23
660
27
24.44
29
0
2023/24
650
27
24.07
28
0
2024/25
650
27
24.07
28
0
2025/26
654
27
24.22
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 362 in 1982/83 → 513, +151 pupils.
Biggest loss in a single year: 2022/23: 687 in 2021/22 → 672, -15 pupils.
Largest single-class increase: 5th Class in 2025/26 (78 → 86, +8).
Largest single-class decrease: 5th Class in 2021/22 (94 → 87, -7).
Largest cohort-step gain: 3rd → 4th in 2025/26 (80 → 84, +4).
Largest cohort-step loss: JI → SI in 2022/23 (82 → 79, -3).
Overall: 202 (1975/76) → 666 (2025/26), 464.
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
81
82
81.8
6
Senior Infants
79
84
81.3
6
1st Class
78
86
82.0
6
2nd Class
80
86
82.7
6
3rd Class
79
86
81.3
6
4th Class
81
86
83.8
6
5th Class
78
94
85.2
6
6th Class
81
92
85.8
6
Total
202
728
564.1
41
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).