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
21.87
2025/26
Mainstream classes
23
2025/26
Largest class group
26
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
224
8
28.00
32
3
2007/08
251
10
25.10
32
1
2008/09
271
10
27.10
35
2
2009/10
283
10
28.30
33
5
2010/11
303
11
27.55
34
2
2011/12
314
12
26.17
30
1
2012/13
323
12
26.92
31
1
2013/14
316
12
26.33
31
3
2014/15
352
13
27.08
32
1
2015/16
387
14
27.64
32
4
2016/17
396
16
24.75
31
3
2017/18
426
16
26.62
33
4
2019/20
510
20
25.50
30
2
2020/21
561
22
25.50
31
2
2021/22
530
23
23.04
30
1
2022/23
551
23
23.96
33
4
2023/24
555
23
24.13
32
2
2024/25
545
23
23.70
29
0
2025/26
503
23
21.87
26
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2019/20: 437 in 2018/19 → 522, +85 pupils.
Biggest loss in a single year: 1993/94: 261 in 1983/84 → 202, -59 pupils.
Largest single-class increase: 6th Class in 2022/23 (56 → 89, +33).
Largest single-class decrease: 6th Class in 2023/24 (89 → 63, -26).
Largest cohort-step gain: 1st → 2nd in 2023/24 (65 → 72, +7).
Largest cohort-step loss: 3rd → 4th in 2021/22 (69 → 63, -6).
Overall: 291 (1974/75) → 521 (2025/26), 230.
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
43
64
58.0
6
Senior Infants
45
68
58.5
6
1st Class
60
71
65.5
6
2nd Class
59
78
69.2
6
3rd Class
64
80
71.5
6
4th Class
63
83
74.3
6
5th Class
62
84
72.2
6
6th Class
56
89
75.7
6
Total
149
573
310.0
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).