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
22.73
2025/26
Mainstream classes
11
2025/26
Largest class group
31
2025/26
Classes with 30+ pupils
3
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
152
6
25.33
32
1
2007/08
164
6
27.33
33
2
2008/09
182
7
26.00
32
1
2009/10
209
7
29.86
32
5
2010/11
217
8
27.12
34
3
2011/12
233
8
29.12
32
4
2012/13
241
9
26.78
35
3
2013/14
247
9
27.44
34
5
2014/15
260
9
28.89
35
6
2015/16
274
10
27.40
35
6
2016/17
275
10
27.50
35
6
2017/18
282
10
28.20
36
6
2019/20
273
11
24.82
36
5
2020/21
268
12
22.33
33
3
2021/22
264
10
26.40
34
5
2022/23
273
11
24.82
34
3
2023/24
262
11
23.82
32
3
2024/25
246
11
22.36
34
1
2025/26
250
11
22.73
31
3
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2009/10: 182 in 2008/09 → 209, +27 pupils.
Biggest loss in a single year: 1993/94: 173 in 1983/84 → 118, -55 pupils.
Largest single-class increase: Junior Infants in 2022/23 (26 → 39, +13).
Largest single-class decrease: 4th Class in 2021/22 (44 → 32, -12).
Largest cohort-step gain: 1st → 2nd in 2024/25 (27 → 29, +2).
Largest cohort-step loss: JI → SI in 2024/25 (32 → 30, -2).
Overall: 158 (1974/75) → 250 (2025/26), 92.
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
26
39
31.3
6
Senior Infants
27
40
31.5
6
1st Class
27
39
31.5
6
2nd Class
29
38
32.3
6
3rd Class
29
33
31.2
6
4th Class
29
44
34.0
6
5th Class
31
45
35.3
6
6th Class
31
45
35.3
6
Total
103
282
186.8
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).