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SCOIL MHUIRE BOYS

Roll number: 19446V Grange Road, Rathfarnham, Dublin 14

School details

Address: Grange Road, Rathfarnham, Dublin 14 (D14P046)
Email: [email protected]
Phone: 014931477
Principal: Edward O'Riordan
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: All-Through School
Planning area: Rathfarnham

Class size history

Mainstream class group data is shown separately from standard/year-group enrolment data. The source does not identify which standard/year group each class group belongs to.

Average class size

22.94

2025/26

Mainstream classes

2025/26

Largest class group

2025/26

Classes with 30+ pupils

2025/26

Class group metrics trend

Class group metrics by year

Year	Mainstream class pupils	Mainstream classes	Average class size	Largest class	Classes 30+
2006/07	434	16	27.12	30	4
2007/08	423	16	26.44	31	3
2008/09	439	16	27.44	30	4
2009/10	459	16	28.69	31	6
2010/11	452	16	28.25	30	2
2011/12	452	16	28.25	31	4
2012/13	470	16	29.38	32	9
2013/14	478	16	29.88	32	12
2014/15	472	16	29.50	32	8
2015/16	458	17	26.94	30	4
2016/17	458	17	26.94	30	4
2017/18	468	17	27.53	30	5
2019/20	444	18	24.67	29	0
2020/21	437	17	25.71	29	0
2021/22	432	17	25.41	29	0
2022/23	419	17	24.65	30	1
2023/24	411	17	24.18	30	1
2024/25	388	17	22.82	30	1
2025/26	367	16	22.94	28	0

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1993/94: 288 in 1982/83 → 530, +242 pupils.
Biggest loss in a single year: 1981/82: 333 in 1980/81 → 302, -31 pupils.
Largest single-class increase: 1st Class in 2023/24 (52 → 64, +12).
Largest single-class decrease: 1st Class in 2024/25 (64 → 39, -25).
Largest cohort-step gain: JI → SI in 2021/22 (48 → 53, +5).
Largest cohort-step loss: 2nd → 3rd in 2025/26 (60 → 53, -7).
Overall: 111 (1974/75) → 367 (2025/26), 256.

Summary statistics (class-level data)

Min / max / mean enrolment per class across the available final by-standard years.

Class	Min	Max	Mean	Years
Junior Infants	38	59	44.2	6
Senior Infants	38	61	47.7	6
1st Class	39	64	51.0	6
2nd Class	39	60	53.7	6
3rd Class	52	58	54.0	6
4th Class	48	58	52.8	6
5th Class	48	58	51.5	6
6th Class	49	62	54.2	6
Total	111	530	412.0	42

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 48

SI 2021/22 53

-1

1st 2022/23 52

2nd 2023/24 54

-1

3rd 2024/25 53

4th 2025/26 55

Cohort 2021/22

JI 2021/22 59

SI 2022/23 61

1st 2023/24 64

-4

2nd 2024/25 60

-7

3rd 2025/26 53

Cohort 2022/23

JI 2022/23 40

SI 2023/24 40

-1

1st 2024/25 39

2nd 2025/26 39

Cohort 2023/24

JI 2023/24 40

SI 2024/25 41

1st 2025/26 42

Cohort 2024/25

JI 2024/25 38

SI 2025/26 38

Cohort 2025/26

JI 2025/26 40

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	–	111	–	–	–	–	–	–	–	–	111
1975/76	–	–	–	–	–	–	–	–	–	–	197
1976/77	–	244	–	–	–	–	–	–	–	–	244
1977/78	–	273	–	–	–	–	–	–	–	–	273
1978/79	–	289	–	–	–	–	–	–	–	–	289
1979/80	–	301	–	–	–	–	–	–	–	–	301
1980/81	–	333	–	–	–	–	–	–	–	–	333
1981/82	–	302	–	–	–	–	–	–	–	–	302
1982/83	–	288	–	–	–	–	–	–	–	–	288
1993/94	–	530	–	–	–	–	–	–	–	–	530
1994/95	–	519	–	–	–	–	–	–	–	–	519
1995/96	–	510	–	–	–	–	–	–	–	–	510
1996/97	–	494	–	–	–	–	–	–	–	–	494
1997/98	–	485	–	–	–	–	–	–	–	–	485
1998/99	–	479	–	–	–	–	–	–	–	–	479
1999/00	–	471	–	–	–	–	–	–	–	–	471
2000/01	–	458	–	–	–	–	–	–	–	–	458
2001/02	–	451	–	–	–	–	–	–	–	–	451
2002/03	–	445	–	–	–	–	–	–	–	–	445
2003/04	–	442	–	–	–	–	–	–	–	–	442
2004/05	–	437	–	–	–	–	–	–	–	–	437
2005/06	–	423	–	–	–	–	–	–	–	–	423
2006/07	–	434	–	–	–	–	–	–	–	–	434
2007/08	–	423	–	–	–	–	–	–	–	–	423
2008/09	–	439	–	–	–	–	–	–	–	–	439
2009/10	–	459	–	–	–	–	–	–	–	–	459
2010/11	–	452	–	–	–	–	–	–	–	–	452
2011/12	–	452	–	–	–	–	–	–	–	–	452
2012/13	–	470	–	–	–	–	–	–	–	–	470
2013/14	–	478	–	–	–	–	–	–	–	–	478
2014/15	–	472	–	–	–	–	–	–	–	–	472
2015/16	–	458	–	–	–	–	–	–	–	–	458
2016/17	–	458	–	–	–	–	–	–	–	–	458
2017/18	–	468	–	–	–	–	–	–	–	–	468
2018/19	–	463	–	–	–	–	–	–	–	–	463
2019/20	–	444	–	–	–	–	–	–	–	–	444
2020/21	–	437	48	53	58	57	55	52	52	62	437
2021/22	–	432	59	53	51	58	58	53	48	52	432
2022/23	–	419	40	61	52	54	52	58	53	49	419
2023/24	–	411	40	40	64	54	53	48	58	54	411
2024/25	–	388	38	41	39	60	53	51	48	58	388
2025/26	–	367	40	38	42	39	53	55	50	50	367