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
22.56
2025/26
Mainstream classes
16
2025/26
Largest class group
32
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
307
11
27.91
36
7
2007/08
320
12
26.67
35
4
2008/09
349
13
26.85
34
3
2009/10
353
14
25.21
34
2
2010/11
365
14
26.07
32
2
2011/12
399
15
26.60
31
3
2012/13
398
16
24.88
29
0
2013/14
395
16
24.69
30
2
2014/15
405
16
25.31
30
2
2015/16
416
16
26.00
30
1
2016/17
434
16
27.12
31
5
2017/18
441
16
27.56
31
4
2019/20
446
17
26.24
33
4
2020/21
455
17
26.76
33
7
2021/22
441
18
24.50
33
4
2022/23
420
18
23.33
31
2
2023/24
400
18
22.22
29
0
2024/25
376
17
22.12
30
1
2025/26
361
16
22.56
32
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2011/12: 365 in 2010/11 → 399, +34 pupils.
Biggest loss in a single year: 1993/94: 115 in 1983/84 → 79, -36 pupils.
Largest single-class increase: 1st Class in 2025/26 (34 → 49, +15).
Largest single-class decrease: 2nd Class in 2024/25 (64 → 35, -29).
Largest cohort-step gain: SI → 1st in 2025/26 (42 → 49, +7).
Largest cohort-step loss: JI → SI in 2024/25 (45 → 42, -3).
Overall: 95 (1974/75) → 373 (2025/26), 278.
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
34
58
41.8
6
Senior Infants
35
60
44.8
6
1st Class
34
63
45.5
6
2nd Class
35
64
47.5
6
3rd Class
40
63
53.3
6
4th Class
47
65
58.3
6
5th Class
47
66
58.3
6
6th Class
51
68
62.0
6
Total
79
467
278.1
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).