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
23.36
2025/26
Mainstream classes
14
2025/26
Largest class group
30
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
252
9
28.00
31
5
2007/08
262
10
26.20
29
0
2008/09
278
10
27.80
32
3
2009/10
309
11
28.09
31
4
2010/11
314
11
28.55
31
5
2011/12
301
12
25.08
29
0
2012/13
320
11
29.09
31
4
2013/14
350
13
26.92
32
4
2014/15
351
13
27.00
33
3
2015/16
345
13
26.54
32
2
2016/17
349
13
26.85
31
1
2017/18
354
13
27.23
30
3
2019/20
364
14
26.00
29
0
2020/21
361
15
24.07
30
2
2021/22
341
16
21.31
28
0
2022/23
368
15
24.53
30
2
2023/24
354
16
22.12
30
1
2024/25
331
15
22.07
30
1
2025/26
327
14
23.36
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2003/04: 163 in 2002/03 → 194, +31 pupils.
Biggest loss in a single year: 1993/94: 270 in 1983/84 → 219, -51 pupils.
Largest single-class increase: 6th Class in 2022/23 (40 → 54, +14).
Largest single-class decrease: 5th Class in 2023/24 (60 → 43, -17).
Largest cohort-step gain: JI → SI in 2022/23 (35 → 43, +8).
Largest cohort-step loss: SI → 1st in 2021/22 (46 → 43, -3).
Overall: 193 (1974/75) → 339 (2025/26), 146.
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
27
42
35.2
6
Senior Infants
32
46
40.2
6
1st Class
38
46
42.7
6
2nd Class
39
46
43.2
6
3rd Class
39
55
45.2
6
4th Class
40
55
47.7
6
5th Class
42
60
49.8
6
6th Class
40
58
48.5
6
Total
144
380
266.4
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).