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
26.29
2025/26
Mainstream classes
24
2025/26
Largest class group
29
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
493
18
27.39
34
8
2007/08
522
19
27.47
33
8
2008/09
528
20
26.40
34
8
2009/10
558
20
27.90
35
8
2010/11
586
22
26.64
35
4
2011/12
621
22
28.23
35
10
2012/13
629
23
27.35
34
4
2013/14
640
23
27.83
32
7
2014/15
660
24
27.50
32
7
2015/16
658
24
27.42
30
1
2016/17
663
24
27.62
31
3
2017/18
658
24
27.42
32
4
2019/20
663
24
27.62
32
6
2020/21
648
25
25.92
32
6
2021/22
648
25
25.92
33
3
2022/23
661
25
26.44
31
4
2023/24
655
25
26.20
30
2
2024/25
635
24
26.46
30
2
2025/26
631
24
26.29
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1995/96: 420 in 1994/95 → 456, +36 pupils.
Biggest loss in a single year: 1993/94: 542 in 1982/83 → 421, -121 pupils.
Largest single-class increase: 5th Class in 2022/23 (74 → 90, +16).
Largest single-class decrease: 5th Class in 2021/22 (94 → 74, -20).
Largest cohort-step gain: JI → SI in 2025/26 (69 → 77, +8).
Largest cohort-step loss: JI → SI in 2022/23 (83 → 81, -2).
Overall: 484 (1975/76) → 643 (2025/26), 159.
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
69
83
76.8
6
Senior Infants
72
81
77.5
6
1st Class
75
83
79.7
6
2nd Class
78
83
81.2
6
3rd Class
79
83
81.2
6
4th Class
72
89
81.2
6
5th Class
74
94
85.2
6
6th Class
76
94
87.8
6
Total
420
670
572.3
41
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).