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
16.87
2025/26
Mainstream classes
15
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
410
16
25.62
31
3
2007/08
421
16
26.31
32
4
2008/09
399
16
24.94
29
0
2009/10
360
15
24.00
28
0
2010/11
302
13
23.23
33
1
2011/12
294
12
24.50
35
1
2012/13
271
11
24.64
34
1
2013/14
259
11
23.55
29
0
2014/15
254
10
25.40
30
1
2015/16
227
9
25.22
29
0
2016/17
206
8
25.75
30
1
2017/18
202
8
25.25
32
1
2019/20
215
8
26.88
33
4
2020/21
207
8
25.88
33
4
2021/22
198
8
24.75
34
2
2022/23
248
12
20.67
28
0
2023/24
274
14
19.57
29
0
2024/25
277
14
19.79
30
1
2025/26
253
15
16.87
26
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1979/80: 254 in 1978/79 → 563, +309 pupils.
Biggest loss in a single year: 1993/94: 665 in 1983/84 → 592, -73 pupils.
Largest single-class increase: 5th Class in 2024/25 (31 → 51, +20).
Largest single-class decrease: 5th Class in 2025/26 (51 → 31, -20).
Largest cohort-step gain: 2nd → 3rd in 2022/23 (23 → 37, +14).
Largest cohort-step loss: SI → 1st in 2025/26 (37 → 32, -5).
Overall: 92 (1976/77) → 265 (2025/26), 173.
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
18
38
27.8
6
Senior Infants
16
41
27.8
6
1st Class
18
39
26.5
6
2nd Class
23
38
29.5
6
3rd Class
26
37
30.0
6
4th Class
26
40
30.8
6
5th Class
30
51
36.2
6
6th Class
29
47
36.2
6
Total
92
670
391.1
41
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).