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
22.75
2025/26
Mainstream classes
20
2025/26
Largest class group
27
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
326
12
27.17
30
3
2007/08
373
14
26.64
30
3
2008/09
402
15
26.80
31
4
2009/10
440
16
27.50
30
1
2010/11
457
16
28.56
31
4
2011/12
441
16
27.56
29
0
2012/13
435
16
27.19
29
0
2013/14
443
16
27.69
30
1
2014/15
449
16
28.06
29
0
2015/16
487
17
28.65
30
4
2016/17
509
18
28.28
31
3
2017/18
517
19
27.21
31
3
2019/20
534
21
25.43
30
2
2020/21
517
21
24.62
30
1
2021/22
504
20
25.20
30
1
2022/23
515
21
24.52
29
0
2023/24
497
21
23.67
29
0
2024/25
474
20
23.70
27
0
2025/26
455
20
22.75
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2004/05: 91 in 2003/04 → 214, +123 pupils.
Biggest loss in a single year: 2024/25: 503 in 2023/24 → 480, -23 pupils.
Largest single-class increase: 6th Class in 2022/23 (58 → 78, +20).
Largest single-class decrease: 5th Class in 2025/26 (80 → 54, -26).
Largest cohort-step gain: 5th → 6th in 2022/23 (71 → 78, +7).
Largest cohort-step loss: 5th → 6th in 2025/26 (80 → 75, -5).
Overall: 22 (2002/03) → 466 (2025/26), 444.
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
50
65
56.5
6
Senior Infants
49
63
54.8
6
1st Class
51
71
58.3
6
2nd Class
51
72
58.3
6
3rd Class
50
83
62.0
6
4th Class
49
83
65.8
6
5th Class
54
81
68.7
6
6th Class
58
82
71.0
6
Total
22
543
414.5
24
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).