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
23.04
2025/26
Mainstream classes
24
2025/26
Largest class group
26
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
100
4
25.00
26
0
2007/08
183
7
26.14
27
0
2008/09
262
10
26.20
28
0
2009/10
344
12
28.67
30
5
2010/11
432
16
27.00
30
1
2011/12
524
19
27.58
31
5
2012/13
619
22
28.14
31
7
2013/14
673
24
28.04
31
12
2014/15
685
24
28.54
31
9
2015/16
695
24
28.96
31
8
2016/17
697
24
29.04
31
10
2017/18
686
24
28.58
31
5
2019/20
653
24
27.21
31
2
2020/21
628
24
26.17
31
1
2021/22
597
24
24.88
28
0
2022/23
563
24
23.46
28
0
2023/24
565
24
23.54
27
0
2024/25
564
24
23.50
26
0
2025/26
553
24
23.04
26
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2012/13: 524 in 2011/12 → 626, +102 pupils.
Biggest loss in a single year: 2022/23: 609 in 2021/22 → 575, -34 pupils.
Largest single-class increase: Junior Infants in 2023/24 (58 → 70, +12).
Largest single-class decrease: Junior Infants in 2025/26 (74 → 52, -22).
Largest cohort-step gain: SI → 1st in 2023/24 (63 → 69, +6).
Largest cohort-step loss: 3rd → 4th in 2022/23 (82 → 76, -6).
Overall: 30 (2005/06) → 565 (2025/26), 535.
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
74
65.7
6
Senior Infants
61
77
70.0
6
1st Class
58
75
70.2
6
2nd Class
61
83
72.3
6
3rd Class
74
82
77.2
6
4th Class
74
79
76.8
6
5th Class
75
86
78.0
6
6th Class
73
87
79.5
6
Total
30
709
518.1
21
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).