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
25.33
2025/26
Mainstream classes
12
2025/26
Largest class group
30
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
307
11
27.91
34
6
2007/08
302
11
27.45
33
5
2008/09
295
11
26.82
33
3
2009/10
308
11
28.00
32
5
2010/11
303
11
27.55
33
6
2011/12
304
11
27.64
33
5
2012/13
319
11
29.00
33
6
2013/14
318
12
26.50
32
3
2014/15
325
12
27.08
33
3
2015/16
330
12
27.50
35
4
2016/17
333
12
27.75
34
4
2017/18
314
12
26.17
34
4
2019/20
318
12
26.50
34
3
2020/21
314
12
26.17
34
3
2021/22
310
12
25.83
34
3
2022/23
308
12
25.67
34
2
2023/24
309
12
25.75
34
2
2024/25
305
12
25.42
30
1
2025/26
304
12
25.33
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 197 in 1983/84 → 259, +62 pupils.
Biggest loss in a single year: 2017/18: 333 in 2016/17 → 314, -19 pupils.
Largest single-class increase: 5th Class in 2024/25 (28 → 51, +23).
Largest single-class decrease: 1st Class in 2025/26 (49 → 24, -25).
Largest cohort-step gain: 2nd → 3rd in 2024/25 (48 → 52, +4).
Largest cohort-step loss: 3rd → 4th in 2025/26 (52 → 50, -2).
Overall: 176 (1974/75) → 304 (2025/26), 128.
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
47
35.2
6
Senior Infants
25
49
36.5
6
1st Class
24
49
40.5
6
2nd Class
29
50
41.5
6
3rd Class
30
52
39.8
6
4th Class
28
50
37.0
6
5th Class
28
51
37.3
6
6th Class
28
51
40.5
6
Total
174
333
274.1
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).