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
22.74
2025/26
Mainstream classes
19
2025/26
Largest class group
31
2025/26
Classes with 30+ pupils
3
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
472
17
27.76
31
10
2007/08
469
17
27.59
31
7
2008/09
475
17
27.94
31
9
2009/10
471
17
27.71
31
9
2010/11
471
17
27.71
31
7
2011/12
479
17
28.18
32
8
2012/13
480
17
28.24
32
9
2013/14
479
17
28.18
32
9
2014/15
476
17
28.00
32
9
2015/16
479
17
28.18
32
10
2016/17
475
18
26.39
32
7
2017/18
483
18
26.83
32
9
2019/20
477
18
26.50
32
7
2020/21
467
18
25.94
31
5
2021/22
466
18
25.89
31
6
2022/23
465
19
24.47
31
3
2023/24
453
19
23.84
31
5
2024/25
445
19
23.42
31
3
2025/26
432
19
22.74
31
3
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 17 in 1982/83 → 372, +355 pupils.
Biggest loss in a single year: 2025/26: 457 in 2024/25 → 444, -13 pupils.
Largest single-class increase: 2nd Class in 2024/25 (51 → 61, +10).
Largest single-class decrease: Senior Infants in 2021/22 (63 → 53, -10).
Largest cohort-step gain: SI → 1st in 2025/26 (52 → 57, +5).
Largest cohort-step loss: JI → SI in 2021/22 (55 → 53, -2).
Overall: 17 (1982/83) → 444 (2025/26), 427.
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
48
60
53.5
6
Senior Infants
51
63
55.8
6
1st Class
53
62
57.5
6
2nd Class
51
61
58.0
6
3rd Class
52
61
58.3
6
4th Class
52
60
57.7
6
5th Class
56
60
58.7
6
6th Class
56
61
58.3
6
Total
17
483
436.4
34
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).