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
23.57
2025/26
Mainstream classes
14
2025/26
Largest class group
32
2025/26
Classes with 30+ pupils
2
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
320
12
26.67
33
4
2007/08
320
12
26.67
33
3
2008/09
329
12
27.42
33
4
2009/10
332
12
27.67
33
6
2010/11
324
13
24.92
33
3
2011/12
343
13
26.38
32
3
2012/13
340
13
26.15
31
3
2013/14
343
13
26.38
34
4
2014/15
359
13
27.62
36
4
2015/16
337
13
25.92
32
2
2016/17
343
13
26.38
33
3
2017/18
327
13
25.15
31
3
2019/20
336
13
25.85
31
2
2020/21
322
13
24.77
31
1
2021/22
312
13
24.00
32
1
2022/23
357
14
25.50
31
6
2023/24
344
15
22.93
30
2
2024/25
331
14
23.64
31
2
2025/26
330
14
23.57
32
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2022/23: 312 in 2021/22 → 357, +45 pupils.
Biggest loss in a single year: 1993/94: 530 in 1983/84 → 454, -76 pupils.
Largest single-class increase: 2nd Class in 2022/23 (37 → 60, +23).
Largest single-class decrease: 2nd Class in 2023/24 (60 → 30, -30).
Largest cohort-step gain: 4th → 5th in 2022/23 (46 → 60, +14).
Largest cohort-step loss: 2nd → 3rd in 2021/22 (34 → 28, -6).
Overall: 523 (1974/75) → 330 (2025/26), -193.
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
30
44
35.5
6
Senior Infants
30
51
40.3
6
1st Class
31
51
42.5
6
2nd Class
30
60
43.5
6
3rd Class
28
57
42.5
6
4th Class
31
58
41.0
6
5th Class
30
60
44.5
6
6th Class
30
57
42.8
6
Total
312
566
400.6
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).