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
21.71
2025/26
Mainstream classes
14
2025/26
Largest class group
31
2025/26
Classes with 30+ pupils
2
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
268
10
26.80
34
2
2007/08
277
10
27.70
37
4
2008/09
261
10
26.10
33
2
2009/10
254
9
28.22
36
4
2010/11
250
9
27.78
33
5
2011/12
247
9
27.44
33
5
2012/13
260
9
28.89
36
5
2013/14
262
10
26.20
32
2
2014/15
263
10
26.30
32
3
2015/16
261
10
26.10
31
2
2016/17
259
10
25.90
32
2
2017/18
280
10
28.00
35
4
2019/20
253
10
25.30
32
3
2020/21
254
10
25.40
32
3
2021/22
269
11
24.45
32
4
2022/23
279
11
25.36
31
2
2023/24
292
12
24.33
31
4
2024/25
312
14
22.29
32
2
2025/26
304
14
21.71
31
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2017/18: 259 in 2016/17 → 280, +21 pupils.
Biggest loss in a single year: 1993/94: 458 in 1982/83 → 362, -96 pupils.
Largest single-class increase: 3rd Class in 2021/22 (28 → 46, +18).
Largest single-class decrease: 2nd Class in 2021/22 (46 → 32, -14).
Largest cohort-step gain: JI → SI in 2023/24 (39 → 45, +6).
Largest cohort-step loss: SI → 1st in 2023/24 (45 → 42, -3).
Overall: 489 (1975/76) → 316 (2025/26), -173.
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
35
51
40.7
6
Senior Infants
29
51
40.3
6
1st Class
30
43
36.7
6
2nd Class
31
46
38.2
6
3rd Class
28
46
37.2
6
4th Class
24
45
34.0
6
5th Class
25
45
33.0
6
6th Class
28
46
34.0
6
Total
247
505
326.5
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).