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
24.72
2025/26
Mainstream classes
18
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
486
17
28.59
33
8
2007/08
474
17
27.88
32
5
2008/09
474
17
27.88
32
6
2009/10
472
17
27.76
31
8
2010/11
431
17
25.35
31
1
2011/12
469
16
29.31
31
8
2012/13
459
17
27.00
32
4
2013/14
460
17
27.06
31
6
2014/15
470
17
27.65
32
5
2015/16
474
17
27.88
33
5
2016/17
473
17
27.82
33
2
2017/18
490
18
27.22
33
2
2019/20
482
18
26.78
32
2
2020/21
482
18
26.78
32
2
2021/22
471
18
26.17
30
1
2022/23
467
19
24.58
29
0
2023/24
467
19
24.58
30
2
2024/25
464
19
24.42
30
2
2025/26
445
18
24.72
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 473 in 1983/84 → 590, +117 pupils.
Biggest loss in a single year: 1999/00: 576 in 1998/99 → 548, -28 pupils.
Largest single-class increase: 1st Class in 2024/25 (54 → 73, +19).
Largest single-class decrease: 1st Class in 2025/26 (73 → 50, -23).
Largest cohort-step gain: SI → 1st in 2024/25 (71 → 73, +2).
Largest cohort-step loss: JI → SI in 2021/22 (58 → 55, -3).
Overall: 136 (1979/80) → 445 (2025/26), 309.
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
50
71
56.3
6
Senior Infants
49
71
56.3
6
1st Class
50
73
57.3
6
2nd Class
55
73
61.5
6
3rd Class
54
69
58.3
6
4th Class
53
69
57.3
6
5th Class
53
70
59.5
6
6th Class
52
71
59.3
6
Total
136
592
476.5
38
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).