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
23.08
2025/26
Mainstream classes
26
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
1
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
695
25
27.80
31
10
2007/08
682
26
26.23
31
9
2008/09
658
24
27.42
31
8
2009/10
643
24
26.79
31
7
2010/11
654
23
28.43
35
9
2011/12
657
24
27.38
33
7
2012/13
700
25
28.00
33
9
2013/14
691
25
27.64
33
6
2014/15
697
25
27.88
30
7
2015/16
690
25
27.60
31
10
2016/17
697
25
27.88
31
6
2017/18
690
25
27.60
31
6
2019/20
675
25
27.00
31
6
2020/21
646
24
26.92
30
6
2021/22
653
24
27.21
30
6
2022/23
637
24
26.54
30
2
2023/24
618
25
24.72
30
1
2024/25
602
26
23.15
29
0
2025/26
600
26
23.08
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 538 in 1983/84 → 868, +330 pupils.
Biggest loss in a single year: 1999/00: 799 in 1998/99 → 756, -43 pupils.
Largest single-class increase: 1st Class in 2025/26 (68 → 78, +10).
Largest single-class decrease: 1st Class in 2024/25 (74 → 68, -6).
Largest cohort-step gain: SI → 1st in 2025/26 (64 → 78, +14).
Largest cohort-step loss: 5th → 6th in 2022/23 (90 → 87, -3).
Overall: 229 (1980/81) → 624 (2025/26), 395.
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
64
75
70.2
6
Senior Infants
64
75
70.5
6
1st Class
68
81
75.7
6
2nd Class
70
81
76.8
6
3rd Class
79
83
81.3
6
4th Class
80
85
82.8
6
5th Class
81
90
86.2
6
6th Class
83
90
86.5
6
Total
229
868
675.0
37
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).