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
28
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
826
29
28.48
33
12
2007/08
802
29
27.66
33
8
2008/09
791
29
27.28
33
9
2009/10
779
28
27.82
34
7
2010/11
774
28
27.64
34
7
2011/12
772
28
27.57
33
10
2012/13
788
28
28.14
32
10
2013/14
770
28
27.50
32
11
2014/15
782
28
27.93
33
11
2015/16
792
28
28.29
33
13
2016/17
787
28
28.11
32
11
2017/18
799
28
28.54
32
14
2019/20
789
28
28.18
32
12
2020/21
746
28
26.64
32
7
2021/22
744
28
26.57
32
7
2022/23
739
28
26.39
32
7
2023/24
704
28
25.14
32
3
2024/25
690
28
24.64
29
0
2025/26
654
28
23.36
29
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1975/76: 540 in 1974/75 → 718, +178 pupils.
Biggest loss in a single year: 2020/21: 789 in 2019/20 → 746, -43 pupils.
Largest single-class increase: 5th Class in 2021/22 (94 → 117, +23).
Largest single-class decrease: 6th Class in 2023/24 (118 → 93, -25).
Largest cohort-step gain: 1st → 2nd in 2021/22 (76 → 81, +5).
Largest cohort-step loss: SI → 1st in 2021/22 (102 → 96, -6).
Overall: 540 (1974/75) → 654 (2025/26), 114.
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
66
85
77.2
6
Senior Infants
74
102
84.5
6
1st Class
76
96
85.0
6
2nd Class
81
99
88.8
6
3rd Class
82
102
90.7
6
4th Class
82
113
94.0
6
5th Class
85
117
96.8
6
6th Class
84
118
95.8
6
Total
540
933
803.8
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).