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
340
12
28.33
32
5
2007/08
364
13
28.00
36
7
2008/09
388
14
27.71
32
4
2009/10
413
15
27.53
33
5
2010/11
438
16
27.38
33
3
2011/12
467
17
27.47
34
5
2012/13
470
17
27.65
32
6
2013/14
479
17
28.18
33
8
2014/15
508
18
28.22
33
9
2015/16
533
19
28.05
34
10
2016/17
529
20
26.45
33
6
2017/18
532
20
26.60
33
8
2019/20
523
20
26.15
34
6
2020/21
510
20
25.50
33
4
2021/22
509
20
25.45
32
3
2022/23
488
20
24.40
32
2
2023/24
494
20
24.70
31
2
2024/25
478
21
22.76
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: 1995/96: 146 in 1994/95 → 177, +31 pupils.
Biggest loss in a single year: 2022/23: 509 in 2021/22 → 488, -21 pupils.
Largest single-class increase: Junior Infants in 2023/24 (56 → 76, +20).
Largest single-class decrease: Senior Infants in 2025/26 (76 → 50, -26).
Largest cohort-step gain: 1st → 2nd in 2022/23 (49 → 51, +2).
Largest cohort-step loss: SI → 1st in 2025/26 (76 → 73, -3).
Overall: 138 (1993/94) → 484 (2025/26), 346.
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
52
76
61.5
6
Senior Infants
50
76
59.8
6
1st Class
49
73
62.0
6
2nd Class
51
69
59.7
6
3rd Class
53
68
60.2
6
4th Class
52
75
61.7
6
5th Class
52
76
64.5
6
6th Class
56
76
66.5
6
Total
138
533
382.1
33
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).