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
23.18
2025/26
Mainstream classes
28
2025/26
Largest class group
28
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
505
18
28.06
33
8
2007/08
511
19
26.89
33
5
2008/09
509
19
26.79
35
6
2009/10
531
19
27.95
35
8
2010/11
539
19
28.37
35
8
2011/12
561
20
28.05
35
8
2012/13
568
20
28.40
36
7
2013/14
611
22
27.77
35
6
2014/15
623
22
28.32
35
6
2015/16
634
23
27.57
35
6
2016/17
656
24
27.33
33
5
2017/18
661
24
27.54
34
6
2019/20
672
26
25.85
31
1
2020/21
677
26
26.04
30
1
2021/22
647
26
24.88
29
0
2022/23
648
27
24.00
28
0
2023/24
634
28
22.64
29
0
2024/25
656
28
23.43
29
0
2025/26
649
28
23.18
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 391 in 1983/84 → 555, +164 pupils.
Biggest loss in a single year: 2021/22: 688 in 2020/21 → 661, -27 pupils.
Largest single-class increase: Junior Infants in 2024/25 (66 → 85, +19).
Largest single-class decrease: 6th Class in 2021/22 (102 → 85, -17).
Largest cohort-step gain: 3rd → 4th in 2023/24 (85 → 93, +8).
Largest cohort-step loss: 5th → 6th in 2025/26 (96 → 94, -2).
Overall: 48 (1977/78) → 666 (2025/26), 618.
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
76.7
6
Senior Infants
70
85
79.0
6
1st Class
73
85
81.2
6
2nd Class
76
85
82.3
6
3rd Class
76
85
82.5
6
4th Class
77
93
84.5
6
5th Class
82
96
87.7
6
6th Class
84
102
90.7
6
Total
48
688
518.0
40
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).