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
24.16
2025/26
Mainstream classes
32
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
270
11
24.55
32
1
2007/08
300
11
27.27
40
3
2008/09
374
14
26.71
33
4
2009/10
441
17
25.94
33
3
2010/11
508
18
28.22
33
8
2011/12
548
20
27.40
32
6
2012/13
615
22
27.95
32
8
2013/14
666
24
27.75
33
10
2014/15
744
27
27.56
34
10
2015/16
778
28
27.79
32
11
2016/17
802
30
26.73
33
8
2017/18
812
30
27.07
33
10
2019/20
901
33
27.30
33
10
2020/21
845
33
25.61
33
5
2021/22
840
33
25.45
32
4
2022/23
799
32
24.97
31
7
2023/24
780
32
24.38
31
4
2024/25
769
32
24.03
31
3
2025/26
773
32
24.16
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2014/15: 677 in 2013/14 → 762, +85 pupils.
Biggest loss in a single year: 2020/21: 925 in 2019/20 → 869, -56 pupils.
Largest single-class increase: 6th Class in 2021/22 (115 → 135, +20).
Largest single-class decrease: 2nd Class in 2022/23 (111 → 91, -20).
Largest cohort-step gain: 1st → 2nd in 2024/25 (87 → 102, +15).
Largest cohort-step loss: SI → 1st in 2022/23 (91 → 83, -8).
Overall: 74 (2003/04) → 805 (2025/26), 731.
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
77
87
83.3
6
Senior Infants
82
101
88.3
6
1st Class
83
107
94.0
6
2nd Class
89
111
98.0
6
3rd Class
94
113
104.2
6
4th Class
99
123
111.0
6
5th Class
104
131
119.2
6
6th Class
106
135
119.5
6
Total
74
925
616.3
23
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).