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
20.59
2025/26
Mainstream classes
17
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
387
16
24.19
31
2
2007/08
371
15
24.73
29
0
2008/09
354
15
23.60
29
0
2009/10
341
14
24.36
31
2
2010/11
305
14
21.79
29
0
2011/12
308
13
23.69
30
1
2012/13
311
12
25.92
33
3
2013/14
307
12
25.58
35
2
2014/15
317
12
26.42
35
3
2015/16
321
12
26.75
33
3
2016/17
286
12
23.83
30
1
2017/18
268
11
24.36
37
2
2019/20
291
12
24.25
32
2
2020/21
310
13
23.85
32
1
2021/22
320
13
24.62
33
3
2022/23
340
16
21.25
29
0
2023/24
329
17
19.35
29
0
2024/25
343
18
19.06
25
0
2025/26
350
17
20.59
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1977/78: 399 in 1976/77 → 434, +35 pupils.
Biggest loss in a single year: 2010/11: 378 in 2009/10 → 342, -36 pupils.
Largest single-class increase: 3rd Class in 2025/26 (40 → 65, +25).
Largest single-class decrease: 6th Class in 2023/24 (56 → 37, -19).
Largest cohort-step gain: 2nd → 3rd in 2025/26 (52 → 65, +13).
Largest cohort-step loss: JI → SI in 2021/22 (34 → 30, -4).
Overall: 402 (1974/75) → 377 (2025/26), -25.
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
29
44
36.0
6
Senior Infants
30
42
36.7
6
1st Class
34
47
40.5
6
2nd Class
32
52
41.7
6
3rd Class
29
65
43.5
6
4th Class
33
51
42.8
6
5th Class
41
57
47.5
6
6th Class
37
56
48.0
6
Total
277
519
412.7
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).