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
22.48
2025/26
Mainstream classes
21
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
408
15
27.20
31
2
2007/08
437
17
25.71
32
2
2008/09
468
18
26.00
29
0
2009/10
494
18
27.44
31
2
2010/11
520
18
28.89
36
7
2011/12
548
19
28.84
34
5
2012/13
612
22
27.82
31
7
2013/14
653
24
27.21
33
5
2014/15
671
24
27.96
33
7
2015/16
711
25
28.44
34
8
2016/17
728
27
26.96
34
3
2017/18
730
27
27.04
32
5
2019/20
697
27
25.81
30
2
2020/21
583
25
23.32
29
0
2021/22
547
25
21.88
28
0
2022/23
539
23
23.43
29
0
2023/24
513
22
23.32
30
1
2024/25
491
22
22.32
29
0
2025/26
472
21
22.48
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2012/13: 548 in 2011/12 → 618, +70 pupils.
Biggest loss in a single year: 2020/21: 709 in 2019/20 → 595, -114 pupils.
Largest single-class increase: 5th Class in 2024/25 (74 → 91, +17).
Largest single-class decrease: Senior Infants in 2021/22 (74 → 55, -19).
Largest cohort-step gain: JI → SI in 2025/26 (41 → 50, +9).
Largest cohort-step loss: SI → 1st in 2021/22 (74 → 69, -5).
Overall: 451 (1974/75) → 496 (2025/26), 45.
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
39
56
47.8
6
Senior Infants
41
74
53.5
6
1st Class
43
81
59.2
6
2nd Class
51
80
64.2
6
3rd Class
58
81
70.2
6
4th Class
70
84
76.0
6
5th Class
71
91
78.0
6
6th Class
70
92
79.5
6
Total
292
779
481.4
43
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).