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
22.75
2025/26
Mainstream classes
12
2025/26
Largest class group
26
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
426
15
28.40
30
4
2007/08
427
16
26.69
30
2
2008/09
426
16
26.62
29
0
2009/10
427
16
26.69
30
1
2010/11
432
16
27.00
30
5
2011/12
434
16
27.12
29
0
2012/13
441
16
27.56
32
5
2013/14
441
16
27.56
32
7
2014/15
427
16
26.69
31
4
2015/16
421
16
26.31
28
0
2016/17
409
16
25.56
30
3
2017/18
400
15
26.67
30
1
2019/20
369
15
24.60
28
0
2020/21
322
15
21.47
23
0
2021/22
311
13
23.92
27
0
2022/23
294
13
22.62
26
0
2023/24
301
13
23.15
27
0
2024/25
280
13
21.54
24
0
2025/26
273
12
22.75
26
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1980/81: 422 in 1979/80 → 457, +35 pupils.
Biggest loss in a single year: 1975/76: 630 in 1974/75 → 396, -234 pupils.
Largest single-class increase: Junior Infants in 2025/26 (84 → 110, +26).
Largest single-class decrease: Senior Infants in 2021/22 (126 → 89, -37).
Largest cohort-step gain: JI → SI in 2021/22 (83 → 89, +6).
Largest cohort-step loss: 1st → 2nd in 2022/23 (124 → 0, -124).
Overall: 630 (1974/75) → 285 (2025/26), -345.
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
83
110
95.0
6
Senior Infants
83
126
99.0
6
1st Class
92
124
104.8
6
2nd Class
0
0
0.0
1
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
285
630
393.1
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).