Friends of Killashee School Company Limited by Guarantee
School type
Ordinary
School level
All-Through School
Planning area
Naas
Class size history
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
24.89
2025/26
Mainstream classes
9
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
195
8
24.38
32
1
2007/08
221
8
27.62
33
3
2008/09
211
8
26.38
32
1
2009/10
210
8
26.25
30
1
2010/11
205
8
25.62
30
1
2011/12
210
8
26.25
31
1
2012/13
207
8
25.88
31
1
2013/14
215
8
26.88
31
3
2014/15
206
8
25.75
33
2
2015/16
177
8
22.12
30
2
2016/17
202
9
22.44
27
0
2017/18
220
9
24.44
30
1
2019/20
241
9
26.78
30
2
2020/21
251
9
27.89
30
2
2021/22
241
9
26.78
29
0
2022/23
241
9
26.78
29
0
2023/24
237
9
26.33
29
0
2024/25
223
9
24.78
28
0
2025/26
224
9
24.89
27
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 2005/06: 148 in 2004/05 → 188, +40 pupils.
Biggest loss in a single year: 2015/16: 206 in 2014/15 → 177, -29 pupils.
Largest single-class increase: Junior Infants in 2025/26 (24 → 46, +22).
Largest single-class decrease: 6th Class in 2025/26 (40 → 25, -15).
Largest cohort-step gain: 5th → 6th in 2024/25 (36 → 40, +4).
Largest cohort-step loss: 1st → 2nd in 2025/26 (27 → 24, -3).
Overall: 87 (1998/99) → 224 (2025/26), 137.
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
23
46
28.7
6
Senior Infants
25
29
26.3
6
1st Class
25
29
27.2
6
2nd Class
24
37
28.5
6
3rd Class
26
45
31.8
6
4th Class
25
43
31.5
6
5th Class
24
42
30.8
6
6th Class
24
42
31.3
6
Total
87
251
190.4
28
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).