By area · Release notes. Enrolment by planning area, local authority, school patron, county.
DIVINE MERCY SENIOR NATIONAL SCHOOL
Roll number: 20187H
Balgaddy, Lucan, Co. Dublin
School details
- Address
- Balgaddy, Lucan, Co. Dublin (K78A393)
- Principal
- Regina Halpin
- Ethos
- Catholic
- DEIS
- N
- Irish classification
- No subjects through Irish
- Gaeltacht
- N
- Island
- N
- Local authority
- South Dublin County Council
- School patron
- Archbishop of Dublin
- School type
- Ordinary
- School level
- Senior
- Planning area
- Lucan
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 loss in a single year: 2021/22: 435 in 2020/21 → 390, -45 pupils.
- Largest single-class increase: 4th Class in 2024/25 (76 → 84, +8).
- Largest single-class decrease: 4th Class in 2025/26 (preliminary) (84 → 0, -84).
- Largest cohort-step gain: 5th → 6th in 2023/24 (93 → 103, +10).
- Largest cohort-step loss: 3rd → 4th in 2023/24 (78 → 76, -2).
- Overall: 435 (2020/21) → 274 (2025/26 (preliminary)), -161.
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 |
66 |
83 |
75.8 |
5 |
| 4th Class |
74 |
107 |
85.6 |
5 |
| 5th Class |
75 |
123 |
96.4 |
5 |
| 6th Class |
81 |
125 |
107.8 |
5 |
| Total |
274 |
435 |
350.3 |
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 |
208 |
227 |
– |
– |
– |
– |
80 |
107 |
123 |
125 |
435 |
| 2021/22 |
186 |
204 |
– |
– |
– |
– |
72 |
87 |
110 |
121 |
390 |
| 2022/23 |
164 |
190 |
– |
– |
– |
– |
78 |
74 |
93 |
109 |
354 |
| 2023/24 |
152 |
191 |
– |
– |
– |
– |
83 |
76 |
81 |
103 |
343 |
| 2024/25 |
145 |
161 |
– |
– |
– |
– |
66 |
84 |
75 |
81 |
306 |
| 2025/26 (preliminary) |
135 |
139 |
– |
– |
– |
– |
– |
– |
– |
– |
274 |