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
24.07
2025/26
Mainstream classes
14
2025/26
Largest class group
30
2025/26
Classes with 30+ pupils
2
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
351
13
27.00
29
0
2007/08
320
13
24.62
28
0
2008/09
328
12
27.33
29
0
2009/10
326
12
27.17
29
0
2010/11
327
12
27.25
29
0
2011/12
330
12
27.50
29
0
2012/13
327
12
27.25
29
0
2013/14
339
12
28.25
29
0
2014/15
344
12
28.67
30
2
2015/16
346
12
28.83
30
3
2016/17
348
12
29.00
30
3
2017/18
345
13
26.54
30
2
2019/20
343
13
26.38
30
3
2020/21
346
13
26.62
30
4
2021/22
352
14
25.14
30
3
2022/23
350
14
25.00
31
3
2023/24
353
14
25.21
31
5
2024/25
338
15
22.53
31
2
2025/26
337
14
24.07
30
2
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1978/79: 237 in 1977/78 → 392, +155 pupils.
Biggest loss in a single year: 1993/94: 523 in 1983/84 → 426, -97 pupils.
Largest single-class increase: 1st Class in 2021/22 (80 → 90, +10).
Largest single-class decrease: Junior Infants in 2024/25 (87 → 76, -11).
Largest cohort-step gain: JI → SI in 2025/26 (76 → 84, +8).
Largest cohort-step loss: 2nd → 3rd in 2025/26 (90 → 0, -90).
Overall: 237 (1977/78) → 337 (2025/26), 100.
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
72
90
83.0
6
Senior Infants
84
90
87.7
6
1st Class
80
92
88.0
6
2nd Class
82
90
87.3
6
3rd Class
0
0
0.0
1
4th Class
0
0
0.0
1
5th Class
0
0
0.0
1
6th Class
0
0
0.0
1
Total
237
535
382.1
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).