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
23.50
2025/26
Mainstream classes
16
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
1
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
457
16
28.56
36
4
2007/08
474
17
27.88
36
4
2008/09
505
18
28.06
33
5
2009/10
505
18
28.06
32
5
2010/11
505
18
28.06
33
6
2011/12
501
18
27.83
32
4
2012/13
492
18
27.33
31
3
2013/14
499
18
27.72
31
4
2014/15
507
18
28.17
32
6
2015/16
517
18
28.72
32
7
2016/17
523
19
27.53
32
6
2017/18
519
19
27.32
32
7
2019/20
508
19
26.74
32
5
2020/21
480
19
25.26
30
2
2021/22
440
19
23.16
26
0
2022/23
432
18
24.00
27
0
2023/24
410
18
22.78
27
0
2024/25
386
17
22.71
26
0
2025/26
376
16
23.50
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 171 in 1983/84 → 362, +191 pupils.
Biggest loss in a single year: 2021/22: 486 in 2020/21 → 446, -40 pupils.
Largest single-class increase: 6th Class in 2024/25 (70 → 97, +27).
Largest single-class decrease: 5th Class in 2024/25 (97 → 69, -28).
Largest cohort-step gain: 1st → 2nd in 2022/23 (59 → 67, +8).
Largest cohort-step loss: 5th → 6th in 2021/22 (85 → 78, -7).
Overall: 157 (1974/75) → 388 (2025/26), 231.
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
52
52
52.0
1
Senior Infants
0
0
0.0
1
1st Class
36
66
52.5
6
2nd Class
45
89
62.2
6
3rd Class
51
89
67.7
6
4th Class
51
90
71.3
6
5th Class
69
97
79.8
6
6th Class
70
97
81.3
6
Total
147
523
381.8
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).