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
25.00
2025/26
Mainstream classes
15
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
226
8
28.25
30
2
2007/08
218
8
27.25
30
1
2008/09
266
9
29.56
31
5
2009/10
302
10
30.20
32
8
2010/11
313
11
28.45
32
7
2011/12
345
12
28.75
33
6
2012/13
369
13
28.38
32
5
2013/14
396
14
28.29
32
4
2014/15
428
15
28.53
33
5
2015/16
471
16
29.44
33
9
2016/17
458
16
28.62
31
8
2017/18
461
16
28.81
31
8
2019/20
444
16
27.75
31
2
2020/21
433
16
27.06
29
0
2021/22
433
16
27.06
30
2
2022/23
423
16
26.44
30
3
2023/24
412
16
25.75
30
3
2024/25
408
16
25.50
31
4
2025/26
375
15
25.00
31
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2008/09: 218 in 2007/08 → 266, +48 pupils.
Biggest loss in a single year: 1978/79: 612 in 1977/78 → 544, -68 pupils.
Largest single-class increase: Junior Infants in 2021/22 (43 → 52, +9).
Largest single-class decrease: Junior Infants in 2025/26 (40 → 21, -19).
Largest cohort-step gain: SI → 1st in 2022/23 (42 → 48, +6).
Largest cohort-step loss: SI → 1st in 2025/26 (48 → 44, -4).
Overall: 718 (1974/75) → 375 (2025/26), -343.
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
21
52
39.8
6
Senior Infants
39
51
45.3
6
1st Class
40
57
48.3
6
2nd Class
42
56
50.2
6
3rd Class
51
59
55.8
6
4th Class
56
60
57.8
6
5th Class
56
60
58.0
6
6th Class
55
61
58.7
6
Total
209
718
390.2
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).