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
24.18
2025/26
Mainstream classes
17
2025/26
Largest class group
27
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
239
9
26.56
36
2
2007/08
231
11
21.00
28
0
2008/09
242
11
22.00
28
0
2009/10
249
11
22.64
30
1
2010/11
249
11
22.64
31
1
2011/12
277
11
25.18
32
2
2012/13
293
11
26.64
30
3
2013/14
305
12
25.42
30
1
2014/15
309
12
25.75
32
2
2015/16
305
12
25.42
29
0
2016/17
297
12
24.75
30
1
2017/18
345
13
26.54
29
0
2019/20
389
16
24.31
29
0
2020/21
410
16
25.62
31
2
2021/22
405
16
25.31
30
2
2022/23
426
16
26.62
30
2
2023/24
416
16
26.00
28
0
2024/25
412
17
24.24
27
0
2025/26
411
17
24.18
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1980/81: 112 in 1979/80 → 228, +116 pupils.
Biggest loss in a single year: 1993/94: 252 in 1983/84 → 216, -36 pupils.
Largest single-class increase: 2nd Class in 2022/23 (38 → 56, +18).
Largest single-class decrease: 2nd Class in 2021/22 (55 → 38, -17).
Largest cohort-step gain: 2nd → 3rd in 2022/23 (38 → 46, +8).
Largest cohort-step loss: 1st → 2nd in 2021/22 (45 → 38, -7).
Overall: 112 (1974/75) → 423 (2025/26), 311.
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
46
58
49.8
6
Senior Infants
46
55
50.7
6
1st Class
45
55
50.3
6
2nd Class
38
56
51.0
6
3rd Class
46
58
52.7
6
4th Class
53
62
55.7
6
5th Class
53
59
56.2
6
6th Class
46
59
53.8
6
Total
112
438
258.6
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).