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
23.81
2025/26
Mainstream classes
27
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
352
13
27.08
33
5
2007/08
372
13
28.62
31
4
2008/09
400
15
26.67
32
3
2009/10
414
14
29.57
32
10
2010/11
441
16
27.56
31
6
2011/12
437
16
27.31
31
4
2012/13
468
17
27.53
31
7
2013/14
472
17
27.76
31
10
2014/15
476
17
28.00
31
8
2015/16
502
17
29.53
33
8
2016/17
536
18
29.78
32
10
2017/18
554
19
29.16
33
9
2019/20
596
22
27.09
30
6
2020/21
625
23
27.17
30
6
2021/22
644
24
26.83
30
3
2022/23
665
26
25.58
30
1
2023/24
653
27
24.19
30
1
2024/25
649
27
24.04
30
1
2025/26
643
27
23.81
31
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1997/98: 130 in 1996/97 → 184, +54 pupils.
Biggest loss in a single year: 2023/24: 665 in 2022/23 → 653, -12 pupils.
Largest single-class increase: 5th Class in 2021/22 (63 → 88, +25).
Largest single-class decrease: 6th Class in 2023/24 (88 → 78, -10).
Largest cohort-step gain: SI → 1st in 2023/24 (81 → 83, +2).
Largest cohort-step loss: 1st → 2nd in 2024/25 (83 → 78, -5).
Overall: 21 (1993/94) → 643 (2025/26), 622.
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
77
90
82.5
6
Senior Infants
76
88
81.3
6
1st Class
79
88
83.3
6
2nd Class
78
86
82.2
6
3rd Class
76
86
80.7
6
4th Class
79
87
82.5
6
5th Class
63
88
78.7
6
6th Class
60
88
75.3
6
Total
21
665
399.8
33
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).