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SCOIL NA MBRATHAR BOYS SENIOR SCHOOL

Roll number: 16695E North Brunswick Street, Dublin 7

School details

Address: North Brunswick Street, Dublin 7 (D07P529)
Email: [email protected]
Phone: 018722167
Principal: Ruth Coghlan
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: All-Through School
Planning area: Cabra_Phibsboro_D7

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

15.43

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	180	10	18.00	25	0
2007/08	194	10	19.40	22	0
2008/09	183	11	16.64	21	0
2009/10	188	10	18.80	23	0
2010/11	206	10	20.60	24	0
2011/12	195	9	21.67	26	0
2012/13	189	9	21.00	29	0
2013/14	174	9	19.33	28	0
2014/15	164	8	20.50	26	0
2015/16	154	8	19.25	26	0
2016/17	156	7	22.29	31	1
2017/18	164	8	20.50	25	0
2019/20	150	8	18.75	24	0
2020/21	158	7	22.57	26	0
2021/22	156	8	19.50	26	0
2022/23	144	8	18.00	26	0
2023/24	139	8	17.38	20	0
2024/25	123	7	17.57	21	0
2025/26	108	7	15.43	21	0

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1975/76: 518 in 1974/75 → 554, +36 pupils.
Biggest loss in a single year: 1993/94: 369 in 1982/83 → 275, -94 pupils.
Largest single-class increase: 2nd Class in 2025/26 (1 → 21, +20).
Largest single-class decrease: 2nd Class in 2022/23 (32 → 10, -22).
Largest cohort-step gain: 4th → 5th in 2022/23 (23 → 28, +5).
Largest cohort-step loss: 4th → 5th in 2024/25 (28 → 24, -4).
Overall: 518 (1974/75) → 120 (2025/26), -398.

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	14	25	17.5	4
Senior Infants	15	17	16.0	3
1st Class	18	18	18.0	2
2nd Class	1	35	19.8	5
3rd Class	2	36	20.4	5
4th Class	0	35	20.5	6
5th Class	13	41	28.3	6
6th Class	24	40	32.2	6
Total	120	554	249.0	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 2022/23

JI 2022/23 15

SI 2023/24 15

1st 2024/25 18

2nd 2025/26 21

Cohort 2023/24

JI 2023/24 16

SI 2024/25 16

1st 2025/26 18

Cohort 2024/25

JI 2024/25 14

SI 2025/26 17

Cohort 2025/26

JI 2025/26 25

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	–	518	–	–	–	–	–	–	–	–	518
1975/76	–	–	–	–	–	–	–	–	–	–	554
1976/77	–	537	–	–	–	–	–	–	–	–	537
1977/78	–	527	–	–	–	–	–	–	–	–	527
1978/79	–	528	–	–	–	–	–	–	–	–	528
1979/80	–	484	–	–	–	–	–	–	–	–	484
1980/81	–	437	–	–	–	–	–	–	–	–	437
1981/82	–	416	–	–	–	–	–	–	–	–	416
1982/83	–	369	–	–	–	–	–	–	–	–	369
1993/94	–	275	–	–	–	–	–	–	–	–	275
1994/95	–	270	–	–	–	–	–	–	–	–	270
1995/96	–	251	–	–	–	–	–	–	–	–	251
1996/97	–	252	–	–	–	–	–	–	–	–	252
1997/98	–	251	–	–	–	–	–	–	–	–	251
1998/99	–	234	–	–	–	–	–	–	–	–	234
1999/00	–	219	–	–	–	–	–	–	–	–	219
2000/01	–	194	–	–	–	–	–	–	–	–	194
2001/02	–	171	–	–	–	–	–	–	–	–	171
2002/03	–	160	–	–	–	–	–	–	–	–	160
2003/04	–	163	–	–	–	–	–	–	–	–	163
2004/05	–	170	–	–	–	–	–	–	–	–	170
2005/06	–	162	–	–	–	–	–	–	–	–	162
2006/07	–	180	–	–	–	–	–	–	–	–	180
2007/08	–	194	–	–	–	–	–	–	–	–	194
2008/09	–	183	–	–	–	–	–	–	–	–	183
2009/10	–	188	–	–	–	–	–	–	–	–	188
2010/11	–	206	–	–	–	–	–	–	–	–	206
2011/12	–	195	–	–	–	–	–	–	–	–	195
2012/13	–	189	–	–	–	–	–	–	–	–	189
2013/14	–	174	–	–	–	–	–	–	–	–	174
2014/15	–	164	–	–	–	–	–	–	–	–	164
2015/16	–	154	–	–	–	–	–	–	–	–	154
2016/17	–	156	–	–	–	–	–	–	–	–	156
2017/18	–	164	–	–	–	–	–	–	–	–	164
2018/19	–	164	–	–	–	–	–	–	–	–	164
2019/20	–	150	–	–	–	–	–	–	–	–	150
2020/21	–	158	–	–	–	35	23	26	41	33	158
2021/22	–	156	–	–	–	32	36	23	26	39	156
2022/23	8	141	15	–	–	10	30	35	28	26	149
2023/24	11	134	16	15	–	–	11	28	38	31	145
2024/25	12	117	14	16	18	1	–	11	24	40	129
2025/26	23	97	25	17	18	21	2	–	13	24	120