By area · Release notes. Enrolment by planning area, local authority, school patron, county.
HOLY TRINITY SEN N S
Roll number: 19406J
Grange Road, Donaghmede, Dublin 13
School details
- Address
- Grange Road, Donaghmede, Dublin 13 (D13WY00)
- Principal
- David Henry
- Ethos
- Catholic
- DEIS
- N
- Irish classification
- No subjects through Irish
- Gaeltacht
- N
- Island
- N
- Local authority
- Dublin City Council
- School patron
- Archbishop of Dublin
- School type
- Ordinary with Special Classes
- School level
- Senior
- Planning area
- Donaghmede_Howth_D13
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.
- Biggest gain in a single year: 2021/22: 394 in 2020/21 → 401, +7 pupils.
- Biggest loss in a single year: 2023/24: 408 in 2022/23 → 401, -7 pupils.
- Largest single-class increase: 6th Class in 2022/23 (84 → 102, +18).
- Largest single-class decrease: 6th Class in 2025/26 (preliminary) (103 → 0, -103).
- Largest cohort-step gain: 3rd → 4th in 2023/24 (92 → 96, +4).
- Largest cohort-step loss: 4th → 5th in 2021/22 (106 → 101, -5).
- Overall: 394 (2020/21) → 397 (2025/26 (preliminary)), 3.
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 |
| 3rd Class |
92 |
103 |
97.0 |
5 |
| 4th Class |
95 |
106 |
100.0 |
5 |
| 5th Class |
85 |
101 |
97.0 |
5 |
| 6th Class |
84 |
103 |
95.6 |
5 |
| Total |
394 |
408 |
400.3 |
6 |
Total enrolment over time
Enrolment by gender over time
Enrolment by class over time
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 |
195 |
199 |
– |
– |
– |
– |
103 |
106 |
85 |
88 |
394 |
| 2021/22 |
200 |
201 |
– |
– |
– |
– |
103 |
101 |
101 |
84 |
401 |
| 2022/23 |
203 |
205 |
– |
– |
– |
– |
92 |
102 |
100 |
102 |
408 |
| 2023/24 |
213 |
188 |
– |
– |
– |
– |
92 |
96 |
101 |
101 |
401 |
| 2024/25 |
202 |
199 |
– |
– |
– |
– |
95 |
95 |
98 |
103 |
401 |
| 2025/26 (preliminary) |
199 |
198 |
– |
– |
– |
– |
– |
– |
– |
– |
397 |