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
23.94
2025/26
Mainstream classes
16
2025/26
Largest class group
27
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
283
10
28.30
29
0
2007/08
325
12
27.08
29
0
2008/09
353
13
27.15
29
0
2009/10
401
14
28.64
30
4
2010/11
429
15
28.60
30
2
2011/12
455
16
28.44
29
0
2012/13
446
16
27.88
29
0
2013/14
446
16
27.88
29
0
2014/15
445
16
27.81
29
0
2015/16
438
16
27.38
29
0
2016/17
432
16
27.00
30
1
2017/18
434
16
27.12
29
0
2019/20
434
16
27.12
30
1
2020/21
417
16
26.06
30
1
2021/22
406
16
25.38
29
0
2022/23
403
16
25.19
28
0
2023/24
398
16
24.88
28
0
2024/25
390
16
24.38
28
0
2025/26
383
16
23.94
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2004/05: 129 in 2003/04 → 191, +62 pupils.
Biggest loss in a single year: 2020/21: 434 in 2019/20 → 417, -17 pupils.
Largest single-class increase: Junior Infants in 2025/26 (37 → 48, +11).
Largest single-class decrease: Senior Infants in 2025/26 (47 → 36, -11).
Largest cohort-step gain: JI → SI in 2021/22 (44 → 47, +3).
Largest cohort-step loss: 3rd → 4th in 2025/26 (51 → 48, -3).
Overall: 46 (2001/02) → 383 (2025/26), 337.
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
37
49
44.8
6
Senior Infants
36
54
46.2
6
1st Class
48
53
49.8
6
2nd Class
48
56
50.3
6
3rd Class
49
55
51.5
6
4th Class
48
55
51.5
6
5th Class
50
58
52.7
6
6th Class
49
58
52.7
6
Total
46
455
354.4
25
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).