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
25.10
2025/26
Mainstream classes
10
2025/26
Largest class group
35
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
269
9
29.89
38
5
2007/08
294
11
26.73
31
2
2008/09
306
11
27.82
33
6
2009/10
326
11
29.64
33
6
2010/11
313
12
26.08
30
1
2011/12
306
12
25.50
30
2
2012/13
312
11
28.36
35
6
2013/14
311
11
28.27
34
5
2014/15
301
12
25.08
33
2
2015/16
319
12
26.58
37
4
2016/17
326
12
27.17
30
3
2017/18
310
12
25.83
33
2
2019/20
319
13
24.54
32
3
2020/21
309
12
25.75
30
1
2021/22
302
12
25.17
30
1
2022/23
281
12
23.42
28
0
2023/24
258
12
21.50
27
0
2024/25
256
11
23.27
30
1
2025/26
251
10
25.10
35
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2004/05: 184 in 2003/04 → 216, +32 pupils.
Biggest loss in a single year: 1993/94: 205 in 1983/84 → 170, -35 pupils.
Largest single-class increase: 1st Class in 2022/23 (22 → 36, +14).
Largest single-class decrease: 2nd Class in 2022/23 (45 → 22, -23).
Largest cohort-step gain: JI → SI in 2025/26 (33 → 36, +3).
Largest cohort-step loss: SI → 1st in 2021/22 (24 → 22, -2).
Overall: 174 (1974/75) → 261 (2025/26), 87.
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
25
37
30.2
6
Senior Infants
24
36
29.2
6
1st Class
22
43
30.3
6
2nd Class
22
45
31.8
6
3rd Class
23
45
34.7
6
4th Class
26
46
38.2
6
5th Class
28
48
40.7
6
6th Class
36
48
42.8
6
Total
162
326
239.8
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).