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
27.00
2025/26
Mainstream classes
20
2025/26
Largest class group
31
2025/26
Classes with 30+ pupils
2
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
487
16
30.44
33
13
2007/08
495
16
30.94
32
13
2008/09
489
16
30.56
32
15
2009/10
498
16
31.12
32
16
2010/11
495
16
30.94
32
15
2011/12
496
16
31.00
32
15
2012/13
525
17
30.88
32
14
2013/14
525
17
30.88
33
14
2014/15
523
17
30.76
33
14
2015/16
524
17
30.82
32
15
2016/17
531
17
31.24
33
15
2017/18
532
17
31.29
33
17
2019/20
541
18
30.06
33
14
2020/21
517
19
27.21
32
10
2021/22
535
19
28.16
32
10
2022/23
548
20
27.40
32
8
2023/24
545
20
27.25
32
6
2024/25
544
20
27.20
32
4
2025/26
540
20
27.00
31
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 339 in 1982/83 → 388, +49 pupils.
Biggest loss in a single year: 1975/76: 399 in 1974/75 → 311, -88 pupils.
Largest single-class increase: Junior Infants in 2021/22 (64 → 83, +19).
Largest single-class decrease: 1st Class in 2025/26 (80 → 56, -24).
Largest cohort-step gain: 3rd → 4th in 2025/26 (70 → 74, +4).
Largest cohort-step loss: 1st → 2nd in 2023/24 (69 → 67, -2).
Overall: 399 (1974/75) → 540 (2025/26), 141.
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
53
83
64.3
6
Senior Infants
56
82
67.7
6
1st Class
56
84
70.7
6
2nd Class
63
84
71.5
6
3rd Class
61
84
69.3
6
4th Class
61
75
66.7
6
5th Class
61
77
65.0
6
6th Class
61
68
63.0
6
Total
309
548
444.4
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).