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
17.77
2025/26
Mainstream classes
13
2025/26
Largest class group
27
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
133
7
19.00
22
0
2007/08
143
8
17.88
23
0
2008/09
149
8
18.62
24
0
2009/10
152
8
19.00
22
0
2010/11
160
8
20.00
26
0
2011/12
182
9
20.22
25
0
2012/13
188
9
20.89
28
0
2013/14
192
10
19.20
24
0
2014/15
178
10
17.80
23
0
2015/16
180
9
20.00
30
1
2016/17
178
9
19.78
29
0
2017/18
186
9
20.67
30
1
2019/20
205
9
22.78
29
0
2020/21
206
10
20.60
28
0
2021/22
214
10
21.40
26
0
2022/23
240
11
21.82
29
0
2023/24
253
13
19.46
28
0
2024/25
255
13
19.62
28
0
2025/26
231
13
17.77
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1978/79: 503 in 1977/78 → 534, +31 pupils.
Biggest loss in a single year: 1993/94: 509 in 1983/84 → 273, -236 pupils.
Largest single-class increase: 5th Class in 2023/24 (27 → 45, +18).
Largest single-class decrease: 5th Class in 2024/25 (45 → 35, -10).
Largest cohort-step gain: 3rd → 4th in 2022/23 (34 → 41, +7).
Largest cohort-step loss: SI → 1st in 2024/25 (34 → 30, -4).
Overall: 482 (1975/76) → 236 (2025/26), -246.
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
34
28.2
6
Senior Infants
23
34
27.5
6
1st Class
22
31
27.7
6
2nd Class
25
35
29.3
6
3rd Class
24
37
30.2
6
4th Class
26
41
30.8
6
5th Class
20
45
30.8
6
6th Class
19
43
29.5
6
Total
134
553
265.9
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).