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
22.33
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
287
10
28.70
34
6
2007/08
281
11
25.55
33
1
2008/09
275
10
27.50
33
3
2009/10
275
10
27.50
33
4
2010/11
261
10
26.10
33
1
2011/12
254
10
25.40
38
2
2012/13
253
10
25.30
36
3
2013/14
244
8
30.50
35
5
2014/15
255
9
28.33
36
4
2015/16
289
10
28.90
38
4
2016/17
299
11
27.18
36
4
2017/18
288
11
26.18
32
5
2019/20
286
11
26.00
30
1
2020/21
280
11
25.45
29
0
2021/22
288
11
26.18
30
1
2022/23
294
12
24.50
28
0
2023/24
275
12
22.92
31
1
2024/25
277
12
23.08
29
0
2025/26
268
12
22.33
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2015/16: 255 in 2014/15 → 289, +34 pupils.
Biggest loss in a single year: 1993/94: 529 in 1982/83 → 364, -165 pupils.
Largest single-class increase: 5th Class in 2024/25 (30 → 46, +16).
Largest single-class decrease: 1st Class in 2025/26 (46 → 30, -16).
Largest cohort-step gain: SI → 1st in 2024/25 (42 → 46, +4).
Largest cohort-step loss: JI → SI in 2022/23 (43 → 39, -4).
Overall: 584 (1975/76) → 280 (2025/26), -304.
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
22
43
33.0
6
Senior Infants
28
42
34.0
6
1st Class
28
46
37.0
6
2nd Class
29
47
37.5
6
3rd Class
28
42
35.7
6
4th Class
28
49
37.8
6
5th Class
30
49
39.8
6
6th Class
28
50
37.5
6
Total
244
627
332.9
40
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).