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
21.58
2025/26
Mainstream classes
26
2025/26
Largest class group
25
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
371
21
17.67
24
0
2007/08
397
21
18.90
27
0
2008/09
374
21
17.81
27
0
2009/10
348
19
18.32
32
1
2010/11
346
19
18.21
28
0
2011/12
425
19
22.37
30
3
2012/13
424
20
21.20
30
1
2013/14
454
20
22.70
33
1
2014/15
485
22
22.05
31
2
2015/16
513
23
22.30
28
0
2016/17
546
25
21.84
27
0
2017/18
576
26
22.15
27
0
2019/20
579
27
21.44
26
0
2020/21
568
28
20.29
25
0
2021/22
571
27
21.15
25
0
2022/23
552
27
20.44
25
0
2023/24
562
27
20.81
26
0
2024/25
556
26
21.38
27
0
2025/26
561
26
21.58
25
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1982/83: 200 in 1981/82 → 430, +230 pupils.
Biggest loss in a single year: 1998/99: 501 in 1997/98 → 457, -44 pupils.
Largest single-class increase: 6th Class in 2021/22 (59 → 96, +37).
Largest single-class decrease: 5th Class in 2021/22 (96 → 74, -22).
Largest cohort-step gain: SI → 1st in 2023/24 (63 → 71, +8).
Largest cohort-step loss: 1st → 2nd in 2024/25 (71 → 64, -7).
Overall: 47 (1979/80) → 574 (2025/26), 527.
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
58
73
64.0
6
Senior Infants
61
76
67.3
6
1st Class
67
77
70.8
6
2nd Class
64
82
72.2
6
3rd Class
62
82
71.0
6
4th Class
61
86
73.5
6
5th Class
57
96
76.0
6
6th Class
57
96
72.0
6
Total
47
602
470.2
38
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).