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
23.31
2025/26
Mainstream classes
13
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
299
10
29.90
34
7
2007/08
325
11
29.55
33
6
2008/09
315
11
28.64
33
4
2009/10
340
12
28.33
33
4
2010/11
341
12
28.42
33
5
2011/12
342
12
28.50
32
6
2012/13
350
13
26.92
32
5
2013/14
377
14
26.93
33
4
2014/15
362
14
25.86
32
2
2015/16
366
14
26.14
34
2
2016/17
361
14
25.79
32
2
2017/18
349
14
24.93
32
1
2019/20
367
13
28.23
37
2
2020/21
327
14
23.36
28
0
2021/22
302
13
23.23
29
0
2022/23
322
12
26.83
35
4
2023/24
307
13
23.62
30
1
2024/25
311
13
23.92
26
0
2025/26
303
13
23.31
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 228 in 1983/84 → 287, +59 pupils.
Biggest loss in a single year: 2020/21: 367 in 2019/20 → 327, -40 pupils.
Largest single-class increase: 4th Class in 2022/23 (32 → 56, +24).
Largest single-class decrease: 6th Class in 2021/22 (53 → 35, -18).
Largest cohort-step gain: 3rd → 4th in 2023/24 (42 → 50, +8).
Largest cohort-step loss: 4th → 5th in 2023/24 (56 → 51, -5).
Overall: 157 (1974/75) → 309 (2025/26), 152.
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
28
35
31.7
6
Senior Infants
29
41
34.7
6
1st Class
34
41
37.3
6
2nd Class
34
47
39.7
6
3rd Class
33
48
40.7
6
4th Class
32
56
43.2
6
5th Class
33
51
43.0
6
6th Class
30
53
44.5
6
Total
157
377
287.3
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).