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
19.30
2025/26
Mainstream classes
10
2025/26
Largest class group
23
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
170
10
17.00
24
0
2007/08
221
11
20.09
24
0
2008/09
251
12
20.92
25
0
2009/10
254
12
21.17
27
0
2010/11
254
12
21.17
28
0
2011/12
272
13
20.92
27
0
2012/13
271
12
22.58
31
1
2013/14
241
11
21.91
28
0
2014/15
233
10
23.30
29
0
2015/16
221
9
24.56
29
0
2016/17
196
8
24.50
27
0
2017/18
183
8
22.88
29
0
2019/20
164
8
20.50
24
0
2020/21
171
8
21.38
28
0
2021/22
166
8
20.75
27
0
2022/23
158
10
15.80
26
0
2023/24
177
10
17.70
27
0
2024/25
175
11
15.91
22
0
2025/26
193
10
19.30
23
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1977/78: 664 in 1976/77 → 743, +79 pupils.
Biggest loss in a single year: 1993/94: 567 in 1983/84 → 345, -222 pupils.
Largest single-class increase: 6th Class in 2025/26 (22 → 37, +15).
Largest single-class decrease: 1st Class in 2021/22 (28 → 12, -16).
Largest cohort-step gain: 5th → 6th in 2025/26 (27 → 37, +10).
Largest cohort-step loss: JI → SI in 2022/23 (22 → 17, -5).
Overall: 551 (1974/75) → 205 (2025/26), -346.
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
18
25
21.0
6
Senior Infants
11
30
19.7
6
1st Class
12
32
21.8
6
2nd Class
14
27
19.8
6
3rd Class
16
25
20.8
6
4th Class
16
25
21.8
6
5th Class
20
27
24.0
6
6th Class
22
37
26.5
6
Total
143
743
316.3
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).