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
23.94
2025/26
Mainstream classes
18
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
5
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
391
14
27.93
30
3
2007/08
388
14
27.71
30
4
2008/09
394
14
28.14
30
7
2009/10
424
15
28.27
30
6
2010/11
428
15
28.53
30
6
2011/12
427
15
28.47
30
8
2012/13
459
16
28.69
30
9
2013/14
464
16
29.00
30
9
2014/15
471
16
29.44
30
12
2015/16
470
16
29.38
30
12
2016/17
457
16
28.56
30
9
2017/18
463
16
28.94
30
10
2019/20
470
17
27.65
31
8
2020/21
454
17
26.71
30
6
2021/22
450
17
26.47
30
7
2022/23
452
17
26.59
30
4
2023/24
444
16
27.75
30
7
2024/25
448
17
26.35
30
7
2025/26
431
18
23.94
30
5
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1978/79: 131 in 1977/78 → 207, +76 pupils.
Biggest loss in a single year: 1993/94: 459 in 1982/83 → 390, -69 pupils.
Largest single-class increase: 1st Class in 2023/24 (44 → 60, +16).
Largest single-class decrease: Senior Infants in 2021/22 (59 → 44, -15).
Largest cohort-step gain: 4th → 5th in 2024/25 (53 → 58, +5).
Largest cohort-step loss: 3rd → 4th in 2023/24 (56 → 53, -3).
Overall: 58 (1976/77) → 431 (2025/26), 373.
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
45
60
51.0
6
Senior Infants
44
60
54.2
6
1st Class
44
60
56.5
6
2nd Class
47
60
57.5
6
3rd Class
49
61
56.5
6
4th Class
48
59
55.2
6
5th Class
56
60
57.8
6
6th Class
53
60
57.8
6
Total
58
471
388.7
40
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).