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
20.94
2025/26
Mainstream classes
17
2025/26
Largest class group
23
2025/26
Classes with 30+ pupils
0
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
158
6
26.33
30
1
2007/08
220
8
27.50
30
1
2008/09
263
12
21.92
26
0
2009/10
298
14
21.29
24
0
2010/11
346
15
23.07
26
0
2011/12
374
16
23.38
27
0
2012/13
404
17
23.76
29
0
2013/14
399
17
23.47
28
0
2014/15
397
17
23.35
26
0
2015/16
399
17
23.47
27
0
2016/17
402
17
23.65
28
0
2017/18
397
17
23.35
27
0
2019/20
401
17
23.59
28
0
2020/21
398
17
23.41
27
0
2021/22
384
17
22.59
27
0
2022/23
376
17
22.12
26
0
2023/24
365
17
21.47
24
0
2024/25
357
17
21.00
23
0
2025/26
356
17
20.94
23
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2006/07: 53 in 2005/06 → 158, +105 pupils.
Biggest loss in a single year: 2021/22: 398 in 2020/21 → 384, -14 pupils.
Largest single-class increase: 3rd Class in 2025/26 (41 → 63, +22).
Largest single-class decrease: Junior Infants in 2022/23 (62 → 41, -21).
Largest cohort-step gain: 1st → 2nd in 2022/23 (42 → 45, +3).
Largest cohort-step loss: 3rd → 4th in 2023/24 (46 → 43, -3).
Overall: 53 (2005/06) → 356 (2025/26), 303.
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
40
62
44.8
6
Senior Infants
40
61
45.2
6
1st Class
41
61
46.0
6
2nd Class
42
61
46.7
6
3rd Class
41
63
47.7
6
4th Class
41
54
45.3
6
5th Class
42
54
47.3
6
6th Class
40
67
49.7
6
Total
53
404
340.3
21
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).