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
20.26
2025/26
Mainstream classes
19
2025/26
Largest class group
26
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
378
17
22.24
27
0
2007/08
410
18
22.78
27
0
2008/09
418
19
22.00
29
0
2009/10
418
19
22.00
27
0
2010/11
421
19
22.16
28
0
2011/12
479
19
25.21
32
6
2012/13
482
18
26.78
30
2
2013/14
474
17
27.88
32
3
2014/15
483
17
28.41
32
8
2015/16
488
17
28.71
32
10
2016/17
473
17
27.82
32
6
2017/18
462
17
27.18
32
6
2019/20
440
17
25.88
30
1
2020/21
419
16
26.19
31
3
2021/22
392
16
24.50
29
0
2022/23
387
20
19.35
25
0
2023/24
386
20
19.30
25
0
2024/25
384
20
19.20
25
0
2025/26
385
19
20.26
26
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2001/02: 224 in 2000/01 → 281, +57 pupils.
Biggest loss in a single year: 1993/94: 398 in 1983/84 → 266, -132 pupils.
Largest single-class increase: 6th Class in 2025/26 (50 → 64, +14).
Largest single-class decrease: 3rd Class in 2021/22 (56 → 43, -13).
Largest cohort-step gain: 4th → 5th in 2024/25 (54 → 63, +9).
Largest cohort-step loss: 3rd → 4th in 2021/22 (56 → 50, -6).
Overall: 592 (1974/75) → 385 (2025/26), -207.
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
33
48
40.2
6
Senior Infants
32
49
41.7
6
1st Class
38
51
44.5
6
2nd Class
42
54
47.5
6
3rd Class
43
56
51.3
6
4th Class
45
59
53.2
6
5th Class
50
63
56.3
6
6th Class
50
64
57.5
6
Total
192
592
391.0
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).