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
22.17
2025/26
Mainstream classes
6
2025/26
Largest class group
32
2025/26
Classes with 30+ pupils
2
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
132
5
26.40
30
1
2007/08
139
5
27.80
32
2
2008/09
135
5
27.00
31
1
2009/10
137
5
27.40
33
2
2010/11
129
5
25.80
34
2
2011/12
122
5
24.40
31
1
2012/13
126
5
25.20
34
1
2013/14
116
5
23.20
26
0
2014/15
112
5
22.40
31
1
2015/16
108
4
27.00
33
1
2016/17
108
4
27.00
29
0
2017/18
113
4
28.25
35
2
2019/20
123
5
24.60
31
1
2020/21
117
5
23.40
33
1
2021/22
124
8
15.50
19
0
2022/23
128
8
16.00
21
0
2023/24
125
8
15.62
20
0
2024/25
142
8
17.75
22
0
2025/26
133
6
22.17
32
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1976/77: 154 in 1975/76 → 174, +20 pupils.
Biggest loss in a single year: 1997/98: 209 in 1996/97 → 187, -22 pupils.
Largest single-class increase: 2nd Class in 2024/25 (12 → 22, +10).
Largest single-class decrease: 1st Class in 2025/26 (21 → 14, -7).
Largest cohort-step gain: 1st → 2nd in 2024/25 (19 → 22, +3).
Largest cohort-step loss: 2nd → 3rd in 2025/26 (22 → 19, -3).
Overall: 145 (1974/75) → 133 (2025/26), -12.
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
12
21
16.8
6
Senior Infants
12
20
16.3
6
1st Class
13
21
16.5
6
2nd Class
12
22
16.8
6
3rd Class
11
19
15.0
6
4th Class
11
19
15.2
6
5th Class
11
19
15.5
6
6th Class
11
18
16.0
6
Total
108
209
149.1
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).