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
22.44
2025/26
Mainstream classes
9
2025/26
Largest class group
34
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
292
11
26.55
31
6
2007/08
312
11
28.36
32
5
2008/09
311
12
25.92
34
6
2009/10
308
12
25.67
35
3
2010/11
286
12
23.83
27
0
2011/12
284
11
25.82
30
2
2012/13
243
10
24.30
29
0
2013/14
239
9
26.56
32
1
2014/15
232
9
25.78
29
0
2015/16
226
9
25.11
35
1
2016/17
204
8
25.50
34
2
2017/18
193
8
24.12
30
1
2019/20
193
7
27.57
33
3
2020/21
165
8
20.62
30
1
2021/22
153
7
21.86
29
0
2022/23
158
7
22.57
26
0
2023/24
171
8
21.38
30
1
2024/25
219
9
24.33
31
1
2025/26
202
9
22.44
34
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1979/80: 593 in 1978/79 → 645, +52 pupils.
Biggest loss in a single year: 1993/94: 690 in 1983/84 → 583, -107 pupils.
Largest single-class increase: 5th Class in 2024/25 (15 → 34, +19).
Largest single-class decrease: 6th Class in 2024/25 (35 → 17, -18).
Largest cohort-step gain: 1st → 2nd in 2024/25 (15 → 26, +11).
Largest cohort-step loss: JI → SI in 2025/26 (38 → 30, -8).
Overall: 641 (1975/76) → 214 (2025/26), -427.
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
14
38
21.7
6
Senior Infants
7
30
20.0
6
1st Class
8
31
19.3
6
2nd Class
10
28
19.0
6
3rd Class
13
27
21.8
6
4th Class
17
30
22.7
6
5th Class
15
34
25.5
6
6th Class
17
43
30.0
6
Total
165
704
361.6
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).