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
19.71
2025/26
Mainstream classes
24
2025/26
Largest class group
23
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
373
14
26.64
29
0
2007/08
392
14
28.00
42
1
2008/09
387
15
25.80
28
0
2009/10
410
15
27.33
30
1
2010/11
400
15
26.67
31
2
2011/12
398
15
26.53
31
2
2012/13
401
15
26.73
29
0
2013/14
418
15
27.87
31
3
2014/15
452
16
28.25
31
4
2015/16
454
16
28.38
32
5
2016/17
460
16
28.75
30
3
2017/18
472
20
23.60
30
1
2019/20
486
22
22.09
30
2
2020/21
485
23
21.09
28
0
2021/22
491
24
20.46
23
0
2022/23
491
24
20.46
23
0
2023/24
489
24
20.38
23
0
2024/25
471
24
19.62
22
0
2025/26
473
24
19.71
23
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2014/15: 418 in 2013/14 → 452, +34 pupils.
Biggest loss in a single year: 1978/79: 688 in 1977/78 → 606, -82 pupils.
Largest single-class increase: 1st Class in 2023/24 (53 → 67, +14).
Largest single-class decrease: Junior Infants in 2024/25 (62 → 46, -16).
Largest cohort-step gain: 1st → 2nd in 2025/26 (54 → 60, +6).
Largest cohort-step loss: 1st → 2nd in 2024/25 (67 → 63, -4).
Overall: 836 (1974/75) → 473 (2025/26), -363.
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
46
64
55.5
6
Senior Infants
51
65
57.2
6
1st Class
53
67
60.0
6
2nd Class
53
68
60.7
6
3rd Class
57
68
62.7
6
4th Class
56
68
62.0
6
5th Class
59
67
63.0
6
6th Class
56
65
62.3
6
Total
377
836
488.2
42
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).