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
24.72
2025/26
Mainstream classes
18
2025/26
Largest class group
28
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
383
14
27.36
34
6
2007/08
400
15
26.67
33
5
2008/09
411
15
27.40
33
2
2009/10
417
15
27.80
33
4
2010/11
423
16
26.44
30
3
2011/12
418
16
26.12
30
2
2012/13
469
17
27.59
31
5
2013/14
463
17
27.24
31
3
2014/15
478
17
28.12
34
5
2015/16
476
17
28.00
34
6
2016/17
486
18
27.00
34
5
2017/18
477
18
26.50
32
5
2019/20
476
18
26.44
34
6
2020/21
450
18
25.00
34
7
2021/22
445
19
23.42
31
4
2022/23
436
18
24.22
32
2
2023/24
463
19
24.37
28
0
2024/25
459
19
24.16
28
0
2025/26
445
18
24.72
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1977/78: 167 in 1976/77 → 228, +61 pupils.
Biggest loss in a single year: 1997/98: 431 in 1996/97 → 392, -39 pupils.
Largest single-class increase: 4th Class in 2024/25 (52 → 70, +18).
Largest single-class decrease: 3rd Class in 2024/25 (68 → 49, -19).
Largest cohort-step gain: 2nd → 3rd in 2023/24 (61 → 68, +7).
Largest cohort-step loss: SI → 1st in 2024/25 (54 → 51, -3).
Overall: 64 (1974/75) → 457 (2025/26), 393.
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
44
65
54.0
6
Senior Infants
44
66
55.5
6
1st Class
46
66
54.5
6
2nd Class
49
61
52.8
6
3rd Class
49
68
56.3
6
4th Class
49
70
57.5
6
5th Class
54
70
61.3
6
6th Class
55
65
59.7
6
Total
64
491
398.2
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).