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
18.65
2025/26
Mainstream classes
20
2025/26
Largest class group
21
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
378
17
22.24
30
2
2007/08
387
18
21.50
28
0
2008/09
370
19
19.47
23
0
2009/10
359
18
19.94
30
1
2010/11
329
17
19.35
27
0
2011/12
343
16
21.44
27
0
2012/13
342
17
20.12
26
0
2013/14
346
17
20.35
27
0
2014/15
319
16
19.94
25
0
2015/16
333
17
19.59
25
0
2016/17
310
17
18.24
27
0
2017/18
325
15
21.67
32
1
2019/20
337
16
21.06
29
0
2020/21
310
16
19.38
28
0
2021/22
326
16
20.38
25
0
2022/23
351
18
19.50
26
0
2023/24
384
20
19.20
23
0
2024/25
388
20
19.40
23
0
2025/26
373
20
18.65
21
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2023/24: 363 in 2022/23 → 396, +33 pupils.
Biggest loss in a single year: 1993/94: 773 in 1982/83 → 560, -213 pupils.
Largest single-class increase: 2nd Class in 2022/23 (32 → 67, +35).
Largest single-class decrease: Senior Infants in 2021/22 (72 → 51, -21).
Largest cohort-step gain: 4th → 5th in 2023/24 (35 → 41, +6).
Largest cohort-step loss: 1st → 2nd in 2021/22 (64 → 32, -32).
Overall: 948 (1974/75) → 384 (2025/26), -564.
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
40
65
50.0
6
Senior Infants
37
72
52.0
6
1st Class
42
76
57.3
6
2nd Class
32
67
50.0
6
3rd Class
20
68
44.5
6
4th Class
22
59
38.5
6
5th Class
22
57
34.8
6
6th Class
25
40
30.0
6
Total
310
953
483.7
42
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).