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
22.69
2025/26
Mainstream classes
16
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
1
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
421
16
26.31
32
4
2007/08
428
16
26.75
32
4
2008/09
432
16
27.00
32
4
2009/10
443
16
27.69
32
5
2010/11
448
16
28.00
32
6
2011/12
441
16
27.56
31
3
2012/13
436
16
27.25
31
3
2013/14
431
16
26.94
32
3
2014/15
434
16
27.12
31
3
2015/16
431
16
26.94
30
1
2016/17
427
16
26.69
30
2
2017/18
432
16
27.00
29
0
2019/20
422
17
24.82
30
1
2020/21
415
16
25.94
29
0
2021/22
419
16
26.19
30
2
2022/23
395
16
24.69
30
1
2023/24
399
16
24.94
30
3
2024/25
378
16
23.62
30
1
2025/26
363
16
22.69
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2004/05: 442 in 2003/04 → 456, +14 pupils.
Biggest loss in a single year: 1979/80: 655 in 1978/79 → 612, -43 pupils.
Largest single-class increase: 4th Class in 2023/24 (44 → 58, +14).
Largest single-class decrease: 4th Class in 2022/23 (60 → 44, -16).
Largest cohort-step gain: 1st → 2nd in 2023/24 (51 → 56, +5).
Largest cohort-step loss: JI → SI in 2022/23 (48 → 43, -5).
Overall: 763 (1974/75) → 369 (2025/26), -394.
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
36
50
42.7
6
Senior Infants
38
50
43.0
6
1st Class
39
55
46.7
6
2nd Class
39
56
49.3
6
3rd Class
45
57
52.5
6
4th Class
44
60
54.3
6
5th Class
47
59
54.2
6
6th Class
46
60
53.2
6
Total
369
763
492.3
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).