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

OUR LADY OF MERCY CONVENT SCHOOL

Roll number: 17970F Rosemount Terrace, Booterstown, Co. Dublin

School details

Address: Rosemount Terrace, Booterstown, Co. Dublin (A94V656)
Email: [email protected]
Phone: 012884223
Principal: Siobhán Hanly
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: Booterstown_Blackrock

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: 1993/94: 206 in 1983/84 → 255, +49 pupils.
Biggest loss in a single year: 2004/05: 256 in 2003/04 → 220, -36 pupils.
Largest single-class increase: 3rd Class in 2022/23 (29 → 45, +16).
Largest single-class decrease: 3rd Class in 2023/24 (45 → 26, -19).
Largest cohort-step gain: JI → SI in 2023/24 (26 → 30, +4).
Largest cohort-step loss: 3rd → 4th in 2021/22 (38 → 33, -5).
Overall: 237 (1974/75) → 247 (2025/26 (preliminary)), 10.

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	36	29.8	5
Senior Infants	29	34	30.4	5
1st Class	29	45	32.8	5
2nd Class	28	43	32.2	5
3rd Class	26	45	32.8	5
4th Class	28	42	34.0	5
5th Class	26	43	34.2	5
6th Class	24	35	29.8	5
Total	151	285	232.3	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

Base cohort:

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 32

-3

SI 2021/22 29

1st 2022/23 30

2nd 2023/24 30

-4

3rd 2024/25 26

Cohort 2021/22

JI 2021/22 30

SI 2022/23 30

-1

1st 2023/24 29

2nd 2024/25 30

Cohort 2022/23

JI 2022/23 26

SI 2023/24 30

1st 2024/25 30

Cohort 2023/24

JI 2023/24 25

SI 2024/25 29

Cohort 2024/25

JI 2024/25 36

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	237	–	–	–	–	–	–	–	–	–	237
1975/76	–	–	–	–	–	–	–	–	–	–	212
1976/77	202	–	–	–	–	–	–	–	–	–	202
1977/78	187	–	–	–	–	–	–	–	–	–	187
1978/79	–	–	–	–	–	–	–	–	–	–	192
1979/80	186	–	–	–	–	–	–	–	–	–	186
1980/81	156	–	–	–	–	–	–	–	–	–	156
1981/82	151	–	–	–	–	–	–	–	–	–	151
1982/83	174	–	–	–	–	–	–	–	–	–	174
1983/84	206	–	–	–	–	–	–	–	–	–	206
1993/94	255	–	–	–	–	–	–	–	–	–	255
1994/95	250	–	–	–	–	–	–	–	–	–	250
1995/96	258	–	–	–	–	–	–	–	–	–	258
1996/97	273	–	–	–	–	–	–	–	–	–	273
1997/98	281	–	–	–	–	–	–	–	–	–	281
1998/99	285	–	–	–	–	–	–	–	–	–	285
1999/00	272	–	–	–	–	–	–	–	–	–	272
2000/01	240	–	–	–	–	–	–	–	–	–	240
2001/02	247	–	–	–	–	–	–	–	–	–	247
2002/03	247	–	–	–	–	–	–	–	–	–	247
2003/04	256	–	–	–	–	–	–	–	–	–	256
2004/05	220	–	–	–	–	–	–	–	–	–	220
2005/06	226	–	–	–	–	–	–	–	–	–	226
2006/07	225	–	–	–	–	–	–	–	–	–	225
2007/08	223	–	–	–	–	–	–	–	–	–	223
2008/09	220	–	–	–	–	–	–	–	–	–	220
2009/10	203	–	–	–	–	–	–	–	–	–	203
2010/11	211	–	–	–	–	–	–	–	–	–	211
2011/12	220	–	–	–	–	–	–	–	–	–	220
2012/13	217	–	–	–	–	–	–	–	–	–	217
2013/14	219	–	–	–	–	–	–	–	–	–	219
2014/15	219	–	–	–	–	–	–	–	–	–	219
2015/16	244	–	–	–	–	–	–	–	–	–	244
2016/17	246	–	–	–	–	–	–	–	–	–	246
2017/18	261	–	–	–	–	–	–	–	–	–	261
2018/19	270	–	–	–	–	–	–	–	–	–	270
2019/20	270	–	–	–	–	–	–	–	–	–	270
2020/21	265	–	32	34	45	30	38	36	26	24	265
2021/22	256	–	30	29	30	43	29	33	35	27	256
2022/23	260	–	26	30	30	28	45	31	37	33	260
2023/24	247	–	25	30	29	30	26	42	30	35	247
2024/25	252	–	36	29	30	30	26	28	43	30	252
2025/26 (preliminary)	247	–	–	–	–	–	–	–	–	–	247