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
23.47
2025/26
Mainstream classes
19
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
466
17
27.41
37
7
2007/08
472
17
27.76
37
9
2008/09
498
18
27.67
32
9
2009/10
499
18
27.72
33
10
2010/11
499
18
27.72
34
9
2011/12
499
18
27.72
34
9
2012/13
501
18
27.83
34
8
2013/14
530
19
27.89
34
10
2014/15
526
19
27.68
36
12
2015/16
520
19
27.37
35
10
2016/17
510
19
26.84
35
8
2017/18
509
19
26.79
35
9
2019/20
500
19
26.32
35
5
2020/21
494
19
26.00
32
4
2021/22
485
19
25.53
32
8
2022/23
466
19
24.53
31
3
2023/24
450
19
23.68
30
1
2024/25
445
19
23.42
30
1
2025/26
446
19
23.47
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1998/99: 389 in 1997/98 → 429, +40 pupils.
Biggest loss in a single year: 1977/78: 384 in 1976/77 → 346, -38 pupils.
Largest single-class increase: 3rd Class in 2025/26 (56 → 71, +15).
Largest single-class decrease: 6th Class in 2021/22 (83 → 60, -23).
Largest cohort-step gain: 2nd → 3rd in 2025/26 (66 → 71, +5).
Largest cohort-step loss: 5th → 6th in 2022/23 (61 → 57, -4).
Overall: 332 (1974/75) → 459 (2025/26), 127.
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
52
68
56.3
6
Senior Infants
52
67
57.8
6
1st Class
52
64
57.7
6
2nd Class
56
66
59.5
6
3rd Class
56
71
59.7
6
4th Class
55
62
57.7
6
5th Class
55
61
57.2
6
6th Class
53
83
60.7
6
Total
307
537
434.0
43
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).