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
23.39
2025/26
Mainstream classes
23
2025/26
Largest class group
28
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
235
9
26.11
32
1
2007/08
268
10
26.80
37
2
2008/09
304
11
27.64
37
2
2009/10
335
12
27.92
37
3
2010/11
362
13
27.85
35
3
2011/12
389
14
27.79
34
4
2012/13
417
15
27.80
34
5
2013/14
442
16
27.62
32
5
2014/15
455
16
28.44
32
6
2015/16
460
16
28.75
31
5
2016/17
477
17
28.06
31
6
2017/18
503
18
27.94
31
6
2019/20
526
20
26.30
30
3
2020/21
545
20
27.25
31
8
2021/22
548
21
26.10
30
7
2022/23
539
22
24.50
30
2
2023/24
562
22
25.55
29
0
2024/25
550
23
23.91
28
0
2025/26
538
23
23.39
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2002/03: 67 in 2001/02 → 109, +42 pupils.
Biggest loss in a single year: 2025/26: 561 in 2024/25 → 550, -11 pupils.
Largest single-class increase: 1st Class in 2025/26 (53 → 81, +28).
Largest single-class decrease: 4th Class in 2023/24 (79 → 55, -24).
Largest cohort-step gain: 1st → 2nd in 2025/26 (53 → 56, +3).
Largest cohort-step loss: 3rd → 4th in 2023/24 (59 → 55, -4).
Overall: 21 (1999/00) → 550 (2025/26), 529.
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
83
69.0
6
Senior Infants
56
88
71.3
6
1st Class
53
88
69.5
6
2nd Class
56
85
68.8
6
3rd Class
59
85
70.5
6
4th Class
55
82
68.5
6
5th Class
56
84
67.8
6
6th Class
56
79
63.5
6
Total
21
562
360.7
27
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).