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
25.19
2025/26
Mainstream classes
21
2025/26
Largest class group
31
2025/26
Classes with 30+ pupils
3
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
534
19
28.11
36
8
2007/08
548
20
27.40
34
6
2008/09
558
20
27.90
34
6
2009/10
561
20
28.05
35
7
2010/11
572
20
28.60
36
8
2011/12
567
21
27.00
32
6
2012/13
555
22
25.23
34
4
2013/14
564
21
26.86
33
4
2014/15
543
21
25.86
32
4
2015/16
535
21
25.48
31
3
2016/17
521
21
24.81
31
2
2017/18
509
20
25.45
32
1
2019/20
520
19
27.37
31
5
2020/21
525
21
25.00
30
2
2021/22
500
21
23.81
30
1
2022/23
508
21
24.19
31
2
2023/24
505
21
24.05
33
2
2024/25
509
21
24.24
30
1
2025/26
529
21
25.19
31
3
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2005/06: 487 in 2004/05 → 522, +35 pupils.
Biggest loss in a single year: 2021/22: 531 in 2020/21 → 506, -25 pupils.
Largest single-class increase: 4th Class in 2024/25 (54 → 81, +27).
Largest single-class decrease: 6th Class in 2021/22 (81 → 56, -25).
Largest cohort-step gain: 2nd → 3rd in 2025/26 (64 → 70, +6).
Largest cohort-step loss: 4th → 5th in 2021/22 (73 → 69, -4).
Overall: 352 (1975/76) → 537 (2025/26), 185.
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
53
69
60.7
6
Senior Infants
56
78
63.7
6
1st Class
50
76
62.3
6
2nd Class
54
75
63.5
6
3rd Class
55
81
66.8
6
4th Class
54
81
68.0
6
5th Class
53
80
64.3
6
6th Class
56
81
65.2
6
Total
352
572
479.0
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).