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
22.45
2025/26
Mainstream classes
22
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
480
18
26.67
31
2
2007/08
488
19
25.68
30
1
2008/09
481
19
25.32
31
1
2009/10
498
19
26.21
31
1
2010/11
500
19
26.32
29
0
2011/12
532
19
28.00
32
4
2012/13
576
20
28.80
33
8
2013/14
594
22
27.00
31
2
2014/15
595
22
27.05
30
1
2015/16
588
22
26.73
29
0
2016/17
584
22
26.55
31
2
2017/18
587
22
26.68
29
0
2019/20
554
22
25.18
30
2
2020/21
532
22
24.18
32
4
2021/22
527
22
23.95
31
2
2022/23
511
22
23.23
31
1
2023/24
516
22
23.45
30
1
2024/25
520
22
23.64
30
3
2025/26
494
22
22.45
30
1
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2012/13: 557 in 2011/12 → 602, +45 pupils.
Biggest loss in a single year: 1996/97: 585 in 1995/96 → 552, -33 pupils.
Largest single-class increase: 4th Class in 2021/22 (42 → 59, +17).
Largest single-class decrease: Junior Infants in 2025/26 (103 → 81, -22).
Largest cohort-step gain: JI → SI in 2023/24 (82 → 90, +8).
Largest cohort-step loss: 1st → 2nd in 2024/25 (98 → 43, -55).
Overall: 519 (1974/75) → 521 (2025/26), 2.
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
81
103
90.3
6
Senior Infants
82
108
93.8
6
1st Class
81
98
92.3
6
2nd Class
38
63
47.5
6
3rd Class
42
63
52.0
6
4th Class
42
60
53.3
6
5th Class
46
59
53.7
6
6th Class
46
61
57.5
6
Total
491
623
549.3
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).