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
21.56
2025/26
Mainstream classes
16
2025/26
Largest class group
29
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
414
15
27.60
30
4
2007/08
427
16
26.69
31
2
2008/09
429
16
26.81
31
3
2009/10
442
16
27.62
32
5
2010/11
433
16
27.06
32
3
2011/12
449
16
28.06
32
4
2012/13
434
16
27.12
29
0
2013/14
439
16
27.44
31
2
2014/15
442
16
27.62
30
4
2015/16
437
16
27.31
31
4
2016/17
440
16
27.50
32
5
2017/18
427
16
26.69
31
4
2019/20
415
16
25.94
31
2
2020/21
387
16
24.19
31
1
2021/22
367
16
22.94
30
1
2022/23
362
15
24.13
27
0
2023/24
363
15
24.20
28
0
2024/25
377
15
25.13
31
3
2025/26
345
16
21.56
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1998/99: 343 in 1997/98 → 367, +24 pupils.
Biggest loss in a single year: 1993/94: 524 in 1982/83 → 378, -146 pupils.
Largest single-class increase: Senior Infants in 2024/25 (38 → 49, +11).
Largest single-class decrease: Senior Infants in 2025/26 (49 → 30, -19).
Largest cohort-step gain: SI → 1st in 2024/25 (38 → 45, +7).
Largest cohort-step loss: 1st → 2nd in 2025/26 (45 → 41, -4).
Overall: 608 (1975/76) → 345 (2025/26), -263.
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
28
42
34.2
6
Senior Infants
30
49
39.3
6
1st Class
36
50
44.8
6
2nd Class
39
47
43.5
6
3rd Class
42
54
47.3
6
4th Class
45
54
49.5
6
5th Class
50
59
54.3
6
6th Class
51
58
53.8
6
Total
334
608
427.8
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).