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
25.44
2025/26
Mainstream classes
16
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
447
16
27.94
33
3
2007/08
446
16
27.88
32
7
2008/09
436
16
27.25
32
4
2009/10
432
16
27.00
32
3
2010/11
430
16
26.88
32
3
2011/12
431
16
26.94
31
2
2012/13
430
16
26.88
32
4
2013/14
436
17
25.65
29
0
2014/15
461
17
27.12
30
3
2015/16
442
17
26.00
33
4
2016/17
430
16
26.88
34
3
2017/18
419
16
26.19
32
2
2019/20
406
16
25.38
31
4
2020/21
380
17
22.35
25
0
2021/22
371
16
23.19
29
0
2022/23
365
15
24.33
31
1
2023/24
384
15
25.60
30
1
2024/25
392
16
24.50
30
2
2025/26
407
16
25.44
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1976/77: 724 in 1974/75 → 752, +28 pupils.
Biggest loss in a single year: 1983/84: 658 in 1982/83 → 564, -94 pupils.
Largest single-class increase: 1st Class in 2023/24 (34 → 51, +17).
Largest single-class decrease: 5th Class in 2021/22 (64 → 44, -20).
Largest cohort-step gain: 3rd → 4th in 2025/26 (40 → 47, +7).
Largest cohort-step loss: SI → 1st in 2022/23 (46 → 34, -12).
Overall: 724 (1974/75) → 407 (2025/26), -317.
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
47
59
53.0
6
Senior Infants
45
60
53.2
6
1st Class
34
52
45.5
6
2nd Class
37
52
45.0
6
3rd Class
40
53
44.7
6
4th Class
39
52
44.3
6
5th Class
42
64
48.0
6
6th Class
44
63
49.5
6
Total
365
752
498.2
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).