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
15.27
2025/26
Mainstream classes
11
2025/26
Largest class group
24
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
352
22
16.00
22
0
2007/08
335
21
15.95
22
0
2008/09
322
20
16.10
21
0
2009/10
321
19
16.89
21
0
2010/11
290
18
16.11
21
0
2011/12
302
16
18.88
23
0
2012/13
296
16
18.50
23
0
2013/14
267
16
16.69
21
0
2014/15
270
15
18.00
22
0
2015/16
270
15
18.00
22
0
2016/17
260
15
17.33
21
0
2017/18
256
14
18.29
24
0
2019/20
240
13
18.46
24
0
2020/21
231
12
19.25
29
0
2021/22
236
13
18.15
23
0
2022/23
214
12
17.83
24
0
2023/24
184
11
16.73
25
0
2024/25
188
12
15.67
25
0
2025/26
168
11
15.27
24
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1981/82: 80 in 1980/81 → 356, +276 pupils.
Biggest loss in a single year: 1998/99: 541 in 1997/98 → 488, -53 pupils.
Largest single-class increase: 5th Class in 2023/24 (15 → 34, +19).
Largest single-class decrease: 4th Class in 2021/22 (43 → 18, -25).
Largest cohort-step gain: 3rd → 4th in 2025/26 (25 → 30, +5).
Largest cohort-step loss: JI → SI in 2022/23 (31 → 26, -5).
Overall: 80 (1980/81) → 195 (2025/26), 115.
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
13
31
22.7
6
Senior Infants
13
30
22.8
6
1st Class
18
29
24.0
6
2nd Class
23
29
25.5
6
3rd Class
18
32
25.7
6
4th Class
18
43
29.0
6
5th Class
15
40
29.5
6
6th Class
14
38
29.0
6
Total
80
669
366.6
36
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).