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
25.69
2025/26
Mainstream classes
26
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
702
24
29.25
34
14
2007/08
707
24
29.46
34
16
2008/09
711
24
29.62
32
17
2009/10
716
24
29.83
32
16
2010/11
721
24
30.04
32
18
2011/12
723
24
30.12
32
20
2012/13
714
24
29.75
31
15
2013/14
721
24
30.04
32
19
2014/15
717
24
29.88
31
17
2015/16
725
24
30.21
31
19
2016/17
721
25
28.84
31
17
2017/18
725
25
29.00
31
18
2019/20
708
26
27.23
30
13
2020/21
708
26
27.23
31
14
2021/22
690
26
26.54
32
5
2022/23
678
26
26.08
30
1
2023/24
663
26
25.50
30
1
2024/25
665
26
25.58
30
1
2025/26
668
26
25.69
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 367 in 1983/84 → 633, +266 pupils.
Biggest loss in a single year: 2002/03: 772 in 2001/02 → 736, -36 pupils.
Largest single-class increase: Junior Infants in 2021/22 (79 → 87, +8).
Largest single-class decrease: Senior Infants in 2021/22 (90 → 79, -11).
Largest cohort-step gain: SI → 1st in 2024/25 (80 → 85, +5).
Largest cohort-step loss: SI → 1st in 2021/22 (90 → 85, -5).
Overall: 129 (1974/75) → 668 (2025/26), 539.
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
78
87
82.2
6
Senior Infants
78
90
82.5
6
1st Class
79
89
83.7
6
2nd Class
82
88
85.0
6
3rd Class
82
90
86.0
6
4th Class
81
89
85.2
6
5th Class
84
93
86.8
6
6th Class
83
93
87.3
6
Total
128
772
589.0
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).