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
25
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
251
9
27.89
34
7
2007/08
256
9
28.44
34
7
2008/09
256
9
28.44
34
6
2009/10
256
9
28.44
34
5
2010/11
258
9
28.67
34
6
2011/12
253
9
28.11
34
5
2012/13
246
9
27.33
34
4
2013/14
250
9
27.78
34
5
2014/15
276
9
30.67
34
6
2015/16
301
10
30.10
34
4
2016/17
359
13
27.62
34
7
2017/18
421
15
28.07
34
9
2019/20
538
19
28.32
34
13
2020/21
574
21
27.33
31
6
2021/22
604
23
26.26
30
4
2022/23
628
24
26.17
30
2
2023/24
630
25
25.20
30
1
2024/25
605
25
24.20
30
1
2025/26
584
25
23.36
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 150 in 1982/83 → 292, +142 pupils.
Biggest loss in a single year: 2024/25: 630 in 2023/24 → 607, -23 pupils.
Largest single-class increase: 5th Class in 2022/23 (54 → 79, +25).
Largest single-class decrease: Junior Infants in 2021/22 (88 → 79, -9).
Largest cohort-step gain: SI → 1st in 2021/22 (87 → 90, +3).
Largest cohort-step loss: 2nd → 3rd in 2024/25 (85 → 76, -9).
Overall: 116 (1980/81) → 587 (2025/26), 471.
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
65
88
74.2
6
Senior Infants
66
87
76.7
6
1st Class
68
90
81.2
6
2nd Class
72
89
83.0
6
3rd Class
70
88
80.2
6
4th Class
58
87
77.7
6
5th Class
49
85
72.0
6
6th Class
31
80
59.8
6
Total
116
630
331.9
36
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).