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
19.20
2025/26
Mainstream classes
5
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
67
3
22.33
25
0
2007/08
72
3
24.00
26
0
2008/09
82
3
27.33
29
0
2009/10
95
4
23.75
25
0
2010/11
91
4
22.75
29
0
2011/12
97
4
24.25
31
1
2012/13
108
4
27.00
31
1
2013/14
112
4
28.00
33
2
2014/15
125
5
25.00
31
1
2015/16
136
5
27.20
35
2
2016/17
129
5
25.80
32
2
2017/18
129
5
25.80
31
2
2019/20
131
6
21.83
30
2
2020/21
129
6
21.50
30
2
2021/22
127
6
21.17
31
1
2022/23
129
6
21.50
33
1
2023/24
115
6
19.17
30
1
2024/25
104
5
20.80
33
1
2025/26
96
5
19.20
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2014/15: 116 in 2013/14 → 131, +15 pupils.
Biggest loss in a single year: 2023/24: 141 in 2022/23 → 127, -14 pupils.
Largest single-class increase: 1st Class in 2022/23 (11 → 21, +10).
Largest single-class decrease: 1st Class in 2023/24 (21 → 9, -12).
Largest cohort-step gain: 2nd → 3rd in 2025/26 (9 → 12, +3).
Largest cohort-step loss: JI → SI in 2023/24 (14 → 13, -1).
Overall: 47 (1974/75) → 107 (2025/26), 60.
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
6
18
10.8
6
Senior Infants
8
19
11.8
6
1st Class
9
21
13.5
6
2nd Class
9
21
14.8
6
3rd Class
11
21
15.7
6
4th Class
12
21
17.5
6
5th Class
12
20
17.2
6
6th Class
12
20
17.2
6
Total
47
149
86.1
42
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).