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
24.19
2025/26
Mainstream classes
16
2025/26
Largest class group
28
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
335
12
27.92
35
4
2007/08
373
14
26.64
33
3
2008/09
368
14
26.29
32
2
2009/10
393
14
28.07
34
3
2010/11
418
15
27.87
31
4
2011/12
428
15
28.53
32
4
2012/13
426
16
26.62
29
0
2013/14
432
16
27.00
28
0
2014/15
425
16
26.56
29
0
2015/16
430
16
26.88
29
0
2016/17
443
16
27.69
29
0
2017/18
421
16
26.31
29
0
2019/20
412
16
25.75
30
2
2020/21
404
16
25.25
29
0
2021/22
396
16
24.75
28
0
2022/23
404
16
25.25
29
0
2023/24
396
17
23.29
29
0
2024/25
395
16
24.69
28
0
2025/26
387
16
24.19
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2007/08: 335 in 2006/07 → 373, +38 pupils.
Biggest loss in a single year: 2017/18: 443 in 2016/17 → 421, -22 pupils.
Largest single-class increase: 4th Class in 2025/26 (48 → 57, +9).
Largest single-class decrease: 3rd Class in 2021/22 (53 → 40, -13).
Largest cohort-step gain: 5th → 6th in 2025/26 (44 → 51, +7).
Largest cohort-step loss: 1st → 2nd in 2024/25 (52 → 50, -2).
Overall: 123 (1974/75) → 404 (2025/26), 281.
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
44
54
49.3
6
Senior Infants
46
54
50.5
6
1st Class
47
53
50.7
6
2nd Class
40
56
49.7
6
3rd Class
40
55
48.8
6
4th Class
43
57
50.0
6
5th Class
44
55
48.8
6
6th Class
48
57
52.0
6
Total
123
443
296.1
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).