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OUR LADYS N S

Roll number: 19922E St Columbanus, Milltown, Dublin 14

School details

Address
St Columbanus, Milltown, Dublin 14 (D14N8H4)
Email
[email protected]
Phone
012981989
Principal
Edel Collins
Ethos
Catholic
DEIS
Y
Irish classification
No subjects through Irish
Gaeltacht
N
Island
N
Local authority
Dun Laoghaire Rathdown
School patron
Archbishop of Dublin
School type
Ordinary with Special Classes
School level
All-Through School
Planning area
Goatstown_Stillorgan_DLR

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
21.38
2025/26
Mainstream classes
8
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 68 4 17.00 22 0
2007/08 71 4 17.75 23 0
2008/09 83 4 20.75 31 1
2009/10 85 5 17.00 22 0
2010/11 98 5 19.60 23 0
2011/12 97 5 19.40 27 0
2012/13 127 6 21.17 25 0
2013/14 180 7 25.71 31 1
2014/15 203 7 29.00 31 5
2015/16 245 10 24.50 35 2
2016/17 233 10 23.30 28 0
2017/18 252 10 25.20 30 1
2019/20 254 10 25.40 30 1
2020/21 229 10 22.90 34 1
2021/22 211 9 23.44 34 1
2022/23 219 10 21.90 31 1
2023/24 200 9 22.22 29 0
2024/25 187 8 23.38 30 1
2025/26 171 8 21.38 27 0

Data highlights

Key numbers to spot outliers or notable changes.

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 15 29 21.3 6
Senior Infants 17 27 21.5 6
1st Class 19 26 22.5 6
2nd Class 19 35 25.5 6
3rd Class 20 34 25.8 6
4th Class 24 35 28.5 6
5th Class 25 30 28.5 6
6th Class 27 34 30.0 6
Total 61 255 139.5 33

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).

Cohort 2020/21
JI 2020/21 21
-1
SI 2021/22 20
+1
1st 2022/23 21
-2
2nd 2023/24 19
+1
3rd 2024/25 20
+5
4th 2025/26 25
Cohort 2021/22
JI 2021/22 22
+2
SI 2022/23 24
-1
1st 2023/24 23
+3
2nd 2024/25 26
-5
3rd 2025/26 21
Cohort 2022/23
JI 2022/23 29
-2
SI 2023/24 27
-4
1st 2024/25 23
+1
2nd 2025/26 24
Cohort 2023/24
JI 2023/24 22
-5
SI 2024/25 17
+2
1st 2025/26 19
Cohort 2024/25
JI 2024/25 19
+1
SI 2025/26 20
Cohort 2025/26
JI 2025/26 15

Raw data by year

Year Female Male JI SI 1st 2nd 3rd 4th 5th 6th Total
1993/94 53 67 – – – – – – – – 120
1994/95 54 60 – – – – – – – – 114
1995/96 56 66 – – – – – – – – 122
1996/97 51 64 – – – – – – – – 115
1997/98 43 53 – – – – – – – – 96
1998/99 43 46 – – – – – – – – 89
1999/00 35 42 – – – – – – – – 77
2000/01 32 33 – – – – – – – – 65
2001/02 24 37 – – – – – – – – 61
2002/03 21 44 – – – – – – – – 65
2003/04 24 41 – – – – – – – – 65
2004/05 27 36 – – – – – – – – 63
2005/06 30 39 – – – – – – – – 69
2006/07 29 39 – – – – – – – – 68
2007/08 32 39 – – – – – – – – 71
2008/09 36 47 – – – – – – – – 83
2009/10 40 45 – – – – – – – – 85
2010/11 47 51 – – – – – – – – 98
2011/12 49 48 – – – – – – – – 97
2012/13 56 71 – – – – – – – – 127
2013/14 84 96 – – – – – – – – 180
2014/15 100 103 – – – – – – – – 203
2015/16 114 131 – – – – – – – – 245
2016/17 100 133 – – – – – – – – 233
2017/18 103 149 – – – – – – – – 252
2018/19 103 152 – – – – – – – – 255
2019/20 110 144 – – – – – – – – 254
2020/21 97 132 21 21 26 35 28 35 29 34 229
2021/22 90 121 22 20 23 25 34 29 30 28 211
2022/23 95 124 29 24 21 24 27 31 30 33 219
2023/24 90 114 22 27 23 19 25 27 29 28 204
2024/25 90 102 19 17 23 26 20 24 28 30 192
2025/26 82 94 15 20 19 24 21 25 25 27 176