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
25.20
2025/26
Mainstream classes
5
2025/26
Largest class group
31
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
131
5
26.20
32
2
2007/08
142
5
28.40
31
2
2008/09
154
5
30.80
33
3
2009/10
162
6
27.00
32
2
2010/11
166
6
27.67
32
1
2011/12
158
6
26.33
33
2
2012/13
170
6
28.33
34
4
2013/14
164
6
27.33
32
2
2014/15
170
6
28.33
32
2
2015/16
166
6
27.67
33
2
2016/17
167
6
27.83
33
1
2017/18
157
6
26.17
28
0
2019/20
149
6
24.83
31
1
2020/21
135
7
19.29
26
0
2021/22
137
6
22.83
31
2
2022/23
136
7
19.43
29
0
2023/24
143
6
23.83
30
1
2024/25
129
6
21.50
27
0
2025/26
126
5
25.20
31
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 134 in 1983/84 → 148, +14 pupils.
Biggest loss in a single year: 2020/21: 149 in 2019/20 → 135, -14 pupils.
Largest single-class increase: 2nd Class in 2021/22 (11 → 21, +10).
Largest single-class decrease: 5th Class in 2025/26 (24 → 11, -13).
Largest cohort-step gain: 3rd → 4th in 2022/23 (13 → 17, +4).
Largest cohort-step loss: JI → SI in 2024/25 (22 → 20, -2).
Overall: 82 (1974/75) → 126 (2025/26), 44.
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
11
22
14.8
6
Senior Infants
11
20
14.8
6
1st Class
13
21
16.8
6
2nd Class
11
21
15.2
6
3rd Class
13
21
16.2
6
4th Class
11
23
18.0
6
5th Class
11
24
19.0
6
6th Class
13
24
19.5
6
Total
82
170
134.7
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).