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S N Seosamh na mBrathar

Roll number: 18726W Marino Park Avenue, Fairview, Dublin 3

School details

Address: Marino Park Avenue, Fairview, Dublin 3 (D03H524)
Email: [email protected]
Phone: 018336127
Principal: Kevin Gillen
Ethos: Catholic
DEIS: Y
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: Drumcondra_Marino_Dublin1

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

19.60

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	179	7	25.57	33	1
2007/08	166	8	20.75	28	0
2008/09	170	7	24.29	38	2
2009/10	179	8	22.38	26	0
2010/11	170	8	21.25	25	0
2011/12	167	7	23.86	27	0
2012/13	158	7	22.57	25	0
2013/14	144	7	20.57	24	0
2014/15	122	6	20.33	23	0
2015/16	114	5	22.80	27	0
2016/17	109	5	21.80	31	1
2017/18	112	5	22.40	29	0
2019/20	107	5	21.40	30	1
2020/21	94	5	18.80	29	0
2021/22	86	5	17.20	22	0
2022/23	103	4	25.75	30	1
2023/24	95	4	23.75	31	1
2024/25	97	5	19.40	23	0
2025/26	98	5	19.60	22	0

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 2002/03: 156 in 2001/02 → 175, +19 pupils.
Biggest loss in a single year: 1993/94: 367 in 1982/83 → 174, -193 pupils.
Largest single-class increase: 4th Class in 2022/23 (12 → 23, +11).
Largest single-class decrease: 6th Class in 2021/22 (29 → 20, -9).
Largest cohort-step gain: SI → 2nd in 2025/26 (0 → 23, +23).
Largest cohort-step loss: 3rd → 4th in 2024/25 (17 → 15, -2).
Overall: 476 (1974/75) → 116 (2025/26), -360.

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	1	2	1.2	4
Senior Infants	1	3	2.0	2
1st Class	2	2	2.0	2
2nd Class	14	23	17.7	6
3rd Class	12	25	17.3	6
4th Class	12	24	18.0	6
5th Class	17	23	20.5	6
6th Class	20	29	24.2	6
Total	104	479	213.4	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 1

-1

SI 2021/22 0

+17

2nd 2023/24 17

3rd 2024/25 17

4th 2025/26 24

Cohort 2022/23

JI 2022/23 1

-1

SI 2023/24 0

+23

2nd 2025/26 23

Cohort 2024/25

JI 2024/25 1

SI 2025/26 3

Cohort 2025/26

JI 2025/26 2

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	–	476	–	–	–	–	–	–	–	–	476
1975/76	–	–	–	–	–	–	–	–	–	–	479
1976/77	–	471	–	–	–	–	–	–	–	–	471
1977/78	–	462	–	–	–	–	–	–	–	–	462
1978/79	–	433	–	–	–	–	–	–	–	–	433
1979/80	–	417	–	–	–	–	–	–	–	–	417
1980/81	–	400	–	–	–	–	–	–	–	–	400
1981/82	–	387	–	–	–	–	–	–	–	–	387
1982/83	–	367	–	–	–	–	–	–	–	–	367
1993/94	–	174	–	–	–	–	–	–	–	–	174
1994/95	–	175	–	–	–	–	–	–	–	–	175
1995/96	–	162	–	–	–	–	–	–	–	–	162
1996/97	–	162	–	–	–	–	–	–	–	–	162
1997/98	–	157	–	–	–	–	–	–	–	–	157
1998/99	–	156	–	–	–	–	–	–	–	–	156
1999/00	–	152	–	–	–	–	–	–	–	–	152
2000/01	–	152	–	–	–	–	–	–	–	–	152
2001/02	–	156	–	–	–	–	–	–	–	–	156
2002/03	–	175	–	–	–	–	–	–	–	–	175
2003/04	–	178	–	–	–	–	–	–	–	–	178
2004/05	–	183	–	–	–	–	–	–	–	–	183
2005/06	–	180	–	–	–	–	–	–	–	–	180
2006/07	–	191	–	–	–	–	–	–	–	–	191
2007/08	–	178	–	–	–	–	–	–	–	–	178
2008/09	–	182	–	–	–	–	–	–	–	–	182
2009/10	–	190	–	–	–	–	–	–	–	–	190
2010/11	–	185	–	–	–	–	–	–	–	–	185
2011/12	–	182	–	–	–	–	–	–	–	–	182
2012/13	–	180	–	–	–	–	–	–	–	–	180
2013/14	–	167	–	–	–	–	–	–	–	–	167
2014/15	–	140	–	–	–	–	–	–	–	–	140
2015/16	–	131	–	–	–	–	–	–	–	–	131
2016/17	–	125	–	–	–	–	–	–	–	–	125
2017/18	–	129	–	–	–	–	–	–	–	–	129
2018/19	–	126	–	–	–	–	–	–	–	–	126
2019/20	–	125	–	–	–	–	–	–	–	–	125
2020/21	–	112	1	–	–	14	12	20	19	29	112
2021/22	–	104	–	–	2	14	17	12	23	20	104
2022/23	–	120	1	1	–	15	16	23	23	28	120
2023/24	–	112	–	–	–	17	17	14	22	25	112
2024/25	–	115	1	–	–	23	17	15	19	23	115
2025/26	–	116	2	3	2	23	25	24	17	20	116