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
18.29
2025/26
Mainstream classes
7
2025/26
Largest class group
23
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
251
12
20.92
26
0
2007/08
249
12
20.75
26
0
2008/09
254
12
21.17
26
0
2009/10
251
12
20.92
25
0
2010/11
229
12
19.08
22
0
2011/12
241
11
21.91
28
0
2012/13
219
11
19.91
25
0
2013/14
225
11
20.45
25
0
2014/15
206
11
18.73
25
0
2015/16
199
10
19.90
28
0
2016/17
201
10
20.10
25
0
2017/18
183
10
18.30
30
1
2019/20
175
9
19.44
27
0
2020/21
168
9
18.67
29
0
2021/22
147
8
18.38
29
0
2022/23
135
7
19.29
26
0
2023/24
148
7
21.14
26
0
2024/25
134
8
16.75
24
0
2025/26
128
7
18.29
23
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1977/78: 705 in 1976/77 → 739, +34 pupils.
Biggest loss in a single year: 1993/94: 677 in 1982/83 → 345, -332 pupils.
Largest single-class increase: 1st Class in 2023/24 (16 → 31, +15).
Largest single-class decrease: 1st Class in 2024/25 (31 → 17, -14).
Largest cohort-step gain: 2nd → 3rd in 2023/24 (19 → 26, +7).
Largest cohort-step loss: 3rd → 4th in 2024/25 (26 → 23, -3).
Overall: 685 (1975/76) → 128 (2025/26), -557.
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
0
0
0.0
1
Senior Infants
0
0
0.0
1
1st Class
16
31
21.7
6
2nd Class
17
28
21.7
6
3rd Class
18
29
24.3
6
4th Class
17
31
24.3
6
5th Class
22
29
25.0
6
6th Class
22
32
26.3
6
Total
128
764
312.1
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).