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
22.17
2025/26
Mainstream classes
12
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
277
10
27.70
31
4
2007/08
264
10
26.40
31
1
2008/09
255
10
25.50
27
0
2009/10
249
9
27.67
36
3
2010/11
249
10
24.90
32
2
2011/12
253
10
25.30
32
1
2012/13
255
10
25.50
31
2
2013/14
280
11
25.45
33
3
2014/15
282
11
25.64
33
3
2015/16
290
11
26.36
33
4
2016/17
302
12
25.17
34
2
2017/18
304
13
23.38
33
2
2019/20
309
12
25.75
34
3
2020/21
305
12
25.42
34
2
2021/22
294
12
24.50
27
0
2022/23
290
12
24.17
28
0
2023/24
284
12
23.67
28
0
2024/25
278
12
23.17
28
0
2025/26
266
12
22.17
26
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1976/77: 604 in 1975/76 → 666, +62 pupils.
Biggest loss in a single year: 1993/94: 628 in 1983/84 → 466, -162 pupils.
Largest single-class increase: 1st Class in 2025/26 (28 → 38, +10).
Largest single-class decrease: Junior Infants in 2025/26 (38 → 25, -13).
Largest cohort-step gain: 1st → 2nd in 2025/26 (28 → 35, +7).
Largest cohort-step loss: 5th → 6th in 2025/26 (40 → 36, -4).
Overall: 543 (1974/75) → 278 (2025/26), -265.
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
25
38
30.8
6
Senior Infants
28
40
33.7
6
1st Class
28
39
34.0
6
2nd Class
28
39
35.7
6
3rd Class
28
40
36.3
6
4th Class
35
40
38.0
6
5th Class
35
45
39.3
6
6th Class
36
45
40.8
6
Total
253
692
390.1
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).