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
24.16
2025/26
Mainstream classes
19
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
2
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
359
13
27.62
34
5
2007/08
402
15
26.80
31
5
2008/09
433
16
27.06
31
6
2009/10
463
16
28.94
33
9
2010/11
474
16
29.62
33
9
2011/12
480
17
28.24
34
8
2012/13
471
17
27.71
33
6
2013/14
474
17
27.88
33
9
2014/15
471
17
27.71
31
8
2015/16
479
16
29.94
32
11
2016/17
476
17
28.00
31
9
2017/18
473
17
27.82
31
6
2019/20
466
17
27.41
33
8
2020/21
465
18
25.83
33
5
2021/22
460
17
27.06
32
6
2022/23
462
17
27.18
32
5
2023/24
457
17
26.88
32
5
2024/25
458
18
25.44
30
3
2025/26
459
19
24.16
30
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2003/04: 164 in 2002/03 → 220, +56 pupils.
Biggest loss in a single year: 2012/13: 480 in 2011/12 → 471, -9 pupils.
Largest single-class increase: 3rd Class in 2022/23 (55 → 63, +8).
Largest single-class decrease: 4th Class in 2021/22 (58 → 50, -8).
Largest cohort-step gain: SI → 1st in 2021/22 (58 → 60, +2).
Largest cohort-step loss: 2nd → 3rd in 2024/25 (61 → 58, -3).
Overall: 33 (1997/98) → 459 (2025/26), 426.
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
56
62
58.3
6
Senior Infants
56
62
58.8
6
1st Class
56
66
59.8
6
2nd Class
56
64
58.7
6
3rd Class
48
63
56.3
6
4th Class
50
61
56.7
6
5th Class
50
61
56.0
6
6th Class
50
61
55.5
6
Total
33
480
361.5
29
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).