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St. Mary's National School

Roll number: 02872U Lamb's Cross, Sandyford, Dublin 18

School details

Address
Lamb's Cross, Sandyford, Dublin 18 (D18XV90)
Email
[email protected]
Phone
012954173
Principal
Fergus Lyons
Ethos
Catholic
DEIS
N
Irish classification
No subjects through Irish
Gaeltacht
N
Island
N
Local authority
Dun Laoghaire Rathdown
School patron
Archbishop of Dublin
School type
Ordinary
School level
All-Through School
Planning area
Ballinteer_Stepaside_DLR

Preliminary data

The latest year shown (2025/26) is preliminary and subject to revision when the official enrolment figures are released by the Department of Education.

Data highlights

Key numbers to spot outliers or notable changes.

Summary statistics (class-level data)

Min / max / mean enrolment per class across the available years (2020/21–2024/25; preliminary year excluded from class stats).

Class Min Max Mean Years
Junior Infants 25 48 33.2 5
Senior Infants 25 42 31.2 5
1st Class 24 42 30.6 5
2nd Class 26 43 30.8 5
3rd Class 26 29 28.0 5
4th Class 26 34 28.8 5
5th Class 28 34 30.4 5
6th Class 28 52 35.2 5
Total 69 265 154.6 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).

Cohort 2020/21
JI 2020/21 25
0
SI 2021/22 25
-1
1st 2022/23 24
+2
2nd 2023/24 26
0
3rd 2024/25 26
Cohort 2021/22
JI 2021/22 48
-6
SI 2022/23 42
0
1st 2023/24 42
+1
2nd 2024/25 43
Cohort 2022/23
JI 2022/23 31
-3
SI 2023/24 28
-2
1st 2024/25 26
Cohort 2023/24
JI 2023/24 30
-1
SI 2024/25 29
Cohort 2024/25
JI 2024/25 32

Raw data by year

Years marked (preliminary) are subject to revision when official data are published.

Year Female Male JI SI 1st 2nd 3rd 4th 5th 6th Total
1974/75 42 57 – – – – – – – – 99
1975/76 – – – – – – – – – – 86
1976/77 45 60 – – – – – – – – 105
1977/78 35 49 – – – – – – – – 84
1978/79 – – – – – – – – – – 71
1979/80 30 39 – – – – – – – – 69
1980/81 32 49 – – – – – – – – 81
1981/82 45 65 – – – – – – – – 110
1982/83 59 87 – – – – – – – – 146
1983/84 68 95 – – – – – – – – 163
1993/94 48 53 – – – – – – – – 101
1994/95 41 48 – – – – – – – – 89
1995/96 34 51 – – – – – – – – 85
1996/97 35 42 – – – – – – – – 77
1997/98 36 48 – – – – – – – – 84
1998/99 38 52 – – – – – – – – 90
1999/00 31 54 – – – – – – – – 85
2000/01 32 56 – – – – – – – – 88
2001/02 41 54 – – – – – – – – 95
2002/03 41 59 – – – – – – – – 100
2003/04 44 53 – – – – – – – – 97
2004/05 57 49 – – – – – – – – 106
2005/06 53 56 – – – – – – – – 109
2006/07 48 53 – – – – – – – – 101
2007/08 55 51 – – – – – – – – 106
2008/09 62 64 – – – – – – – – 126
2009/10 79 80 – – – – – – – – 159
2010/11 91 92 – – – – – – – – 183
2011/12 117 95 – – – – – – – – 212
2012/13 124 102 – – – – – – – – 226
2013/14 144 113 – – – – – – – – 257
2014/15 136 124 – – – – – – – – 260
2015/16 128 131 – – – – – – – – 259
2016/17 128 136 – – – – – – – – 264
2017/18 124 139 – – – – – – – – 263
2018/19 129 134 – – – – – – – – 263
2019/20 124 141 – – – – – – – – 265
2020/21 115 141 25 32 30 27 27 34 29 52 256
2021/22 115 134 48 25 31 28 29 26 34 28 249
2022/23 118 132 31 42 24 30 29 29 31 34 250
2023/24 120 122 30 28 42 26 29 26 30 31 242
2024/25 127 117 32 29 26 43 26 29 28 31 244
2025/26 (preliminary) 118 124 – – – – – – – – 242