By area · Release notes. Enrolment by planning area, local authority, school patron, county.

ST Olaf's National School

Roll number: 19319O Balally Drive, Dundrum, Dublin 16

School details

Address
Balally Drive, Dundrum, Dublin 16 (D16E067)
Email
[email protected]
Phone
012956513
Principal
Ger Murphy
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
Goatstown_Stillorgan_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 66 81 73.4 5
Senior Infants 70 80 75.8 5
1st Class 55 80 71.6 5
2nd Class 53 83 69.8 5
3rd Class 54 82 70.6 5
4th Class 54 79 65.4 5
5th Class 53 76 61.2 5
6th Class 54 78 61.2 5
Total 521 591 556.0 6

Total enrolment over time

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 79
-3
SI 2021/22 76
-1
1st 2022/23 75
+4
2nd 2023/24 79
+3
3rd 2024/25 82
Cohort 2021/22
JI 2021/22 81
-1
SI 2022/23 80
0
1st 2023/24 80
+3
2nd 2024/25 83
Cohort 2022/23
JI 2022/23 68
+2
SI 2023/24 70
+3
1st 2024/25 73
Cohort 2023/24
JI 2023/24 73
+3
SI 2024/25 76
Cohort 2024/25
JI 2024/25 66

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
2020/21 235 286 79 77 55 60 81 57 57 55 521
2021/22 247 286 81 76 75 53 58 78 58 54 533
2022/23 255 289 68 80 75 74 54 59 76 58 544
2023/24 264 310 73 70 80 79 78 54 62 78 574
2024/25 263 310 66 76 73 83 82 79 53 61 573
2025/26 (preliminary) 284 307 591