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
18.73
2025/26
Mainstream classes
15
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
399
18
22.17
27
0
2007/08
410
19
21.58
28
0
2008/09
422
19
22.21
28
0
2009/10
396
19
20.84
27
0
2010/11
388
19
20.42
26
0
2011/12
360
18
20.00
26
0
2012/13
331
18
18.39
26
0
2013/14
330
16
20.62
29
0
2014/15
315
14
22.50
28
0
2015/16
308
12
25.67
33
1
2016/17
305
12
25.42
30
3
2017/18
268
14
19.14
26
0
2019/20
304
14
21.71
29
0
2020/21
293
14
20.93
29
0
2021/22
298
14
21.29
33
1
2022/23
308
15
20.53
28
0
2023/24
293
16
18.31
25
0
2024/25
289
15
19.27
31
1
2025/26
281
15
18.73
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1976/77: 739 in 1974/75 → 791, +52 pupils.
Biggest loss in a single year: 1993/94: 733 in 1983/84 → 563, -170 pupils.
Largest single-class increase: Senior Infants in 2022/23 (46 → 60, +14).
Largest single-class decrease: 1st Class in 2025/26 (58 → 39, -19).
Largest cohort-step gain: 4th → 5th in 2025/26 (37 → 42, +5).
Largest cohort-step loss: 1st → 2nd in 2023/24 (47 → 20, -27).
Overall: 739 (1974/75) → 281 (2025/26), -458.
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
58
46.3
6
Senior Infants
36
60
49.5
6
1st Class
39
58
52.0
6
2nd Class
20
33
29.0
6
3rd Class
21
37
29.5
6
4th Class
20
37
27.8
6
5th Class
23
42
30.8
6
6th Class
25
38
28.7
6
Total
268
823
465.1
42
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).