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
17.14
2025/26
Mainstream classes
14
2025/26
Largest class group
25
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
288
13
22.15
31
1
2007/08
299
14
21.36
31
1
2008/09
297
14
21.21
31
1
2009/10
294
12
24.50
30
2
2010/11
274
12
22.83
30
2
2011/12
294
12
24.50
31
3
2012/13
292
12
24.33
31
1
2013/14
301
12
25.08
33
4
2014/15
287
12
23.92
31
1
2015/16
278
12
23.17
30
1
2016/17
266
12
22.17
31
2
2017/18
261
12
21.75
29
0
2019/20
259
11
23.55
31
1
2020/21
268
12
22.33
34
1
2021/22
249
11
22.64
28
0
2022/23
248
13
19.08
26
0
2023/24
250
13
19.23
26
0
2024/25
238
13
18.31
27
0
2025/26
240
14
17.14
25
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1976/77: 692 in 1975/76 → 715, +23 pupils.
Biggest loss in a single year: 1993/94: 540 in 1982/83 → 351, -189 pupils.
Largest single-class increase: Junior Infants in 2025/26 (19 → 34, +15).
Largest single-class decrease: 4th Class in 2025/26 (42 → 25, -17).
Largest cohort-step gain: JI → SI in 2025/26 (19 → 24, +5).
Largest cohort-step loss: JI → SI in 2021/22 (31 → 28, -3).
Overall: 692 (1975/76) → 252 (2025/26), -440.
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
19
34
27.7
6
Senior Infants
24
37
29.3
6
1st Class
26
36
31.2
6
2nd Class
26
36
30.2
6
3rd Class
26
39
31.5
6
4th Class
24
42
32.0
6
5th Class
24
42
33.7
6
6th Class
27
42
35.5
6
Total
250
715
358.9
40
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).