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
23.17
2025/26
Mainstream classes
6
2025/26
Largest class group
27
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
98
4
24.50
27
0
2007/08
90
4
22.50
26
0
2008/09
100
4
25.00
26
0
2009/10
102
4
25.50
32
1
2010/11
108
4
27.00
29
0
2011/12
112
4
28.00
33
1
2012/13
107
4
26.75
30
1
2013/14
107
4
26.75
30
1
2014/15
108
4
27.00
29
0
2015/16
116
4
29.00
32
1
2016/17
115
5
23.00
31
1
2017/18
122
4
30.50
36
1
2019/20
131
5
26.20
36
2
2020/21
133
5
26.60
33
2
2021/22
142
5
28.40
34
2
2022/23
142
6
23.67
34
2
2023/24
144
6
24.00
28
0
2024/25
142
6
23.67
36
1
2025/26
139
6
23.17
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1980/81: 91 in 1979/80 → 115, +24 pupils.
Biggest loss in a single year: 1998/99: 125 in 1997/98 → 108, -17 pupils.
Largest single-class increase: 4th Class in 2023/24 (13 → 23, +10).
Largest single-class decrease: 3rd Class in 2025/26 (23 → 16, -7).
Largest cohort-step gain: 1st → 2nd in 2025/26 (19 → 21, +2).
Largest cohort-step loss: 1st → 2nd in 2022/23 (21 → 19, -2).
Overall: 72 (1974/75) → 139 (2025/26), 67.
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
8
22
16.0
6
Senior Infants
14
22
18.2
6
1st Class
15
21
18.8
6
2nd Class
13
22
18.5
6
3rd Class
13
23
17.5
6
4th Class
13
24
18.3
6
5th Class
13
23
17.3
6
6th Class
10
21
15.7
6
Total
72
153
112.6
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).