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
24.29
2025/26
Mainstream classes
24
2025/26
Largest class group
27
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
403
15
26.87
34
2
2007/08
448
16
28.00
33
7
2008/09
466
17
27.41
31
9
2009/10
464
17
27.29
32
7
2010/11
452
17
26.59
31
2
2011/12
482
17
28.35
33
7
2012/13
490
17
28.82
34
9
2013/14
497
18
27.61
32
6
2014/15
527
19
27.74
33
6
2015/16
525
19
27.63
32
8
2016/17
543
20
27.15
35
7
2017/18
561
21
26.71
34
5
2019/20
570
22
25.91
33
3
2020/21
592
22
26.91
33
4
2021/22
590
23
25.65
34
2
2022/23
598
24
24.92
29
0
2023/24
614
24
25.58
29
0
2024/25
601
24
25.04
28
0
2025/26
583
24
24.29
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1976/77: 169 in 1975/76 → 282, +113 pupils.
Biggest loss in a single year: 1993/94: 467 in 1983/84 → 392, -75 pupils.
Largest single-class increase: 2nd Class in 2023/24 (62 → 78, +16).
Largest single-class decrease: 1st Class in 2021/22 (81 → 58, -23).
Largest cohort-step gain: 1st → 2nd in 2025/26 (68 → 74, +6).
Largest cohort-step loss: SI → 1st in 2024/25 (74 → 68, -6).
Overall: 165 (1974/75) → 595 (2025/26), 430.
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
61
85
72.8
6
Senior Infants
62
85
73.3
6
1st Class
58
85
74.0
6
2nd Class
62
80
74.8
6
3rd Class
65
82
75.0
6
4th Class
66
80
75.3
6
5th Class
66
81
75.7
6
6th Class
68
83
78.5
6
Total
165
626
457.7
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).