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
23.15
2025/26
Mainstream classes
13
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
306
11
27.82
32
7
2007/08
315
11
28.64
32
6
2008/09
310
12
25.83
31
5
2009/10
309
11
28.09
32
6
2010/11
298
11
27.09
31
3
2011/12
303
11
27.55
31
5
2012/13
316
11
28.73
32
5
2013/14
319
12
26.58
31
3
2014/15
318
12
26.50
32
3
2015/16
337
12
28.08
35
4
2016/17
364
14
26.00
31
2
2017/18
352
14
25.14
30
1
2019/20
363
14
25.93
28
0
2020/21
347
14
24.79
28
0
2021/22
325
14
23.21
29
0
2022/23
335
13
25.77
32
3
2023/24
320
14
22.86
28
0
2024/25
307
13
23.62
30
1
2025/26
301
13
23.15
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2016/17: 337 in 2015/16 → 364, +27 pupils.
Biggest loss in a single year: 1993/94: 515 in 1982/83 → 341, -174 pupils.
Largest single-class increase: 5th Class in 2021/22 (56 → 74, +18).
Largest single-class decrease: 6th Class in 2021/22 (82 → 57, -25).
Largest cohort-step gain: 4th → 5th in 2023/24 (60 → 64, +4).
Largest cohort-step loss: 3rd → 4th in 2021/22 (75 → 73, -2).
Overall: 738 (1974/75) → 301 (2025/26), -437.
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
0
0
0.0
1
Senior Infants
0
0
0.0
1
1st Class
0
0
0.0
1
2nd Class
54
63
59.5
6
3rd Class
55
75
62.3
6
4th Class
55
74
65.2
6
5th Class
56
74
66.2
6
6th Class
57
82
69.3
6
Total
298
738
383.4
42
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).