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ST BRIGIDS BOYS N S

Roll number: 19308J Howth Road, Killester, Dublin 5

School details

Address: Howth Road, Killester, Dublin 5 (D05A386)
Email: [email protected]
Phone: 018336149
Principal: Nuala Cullen
Ethos: Catholic
DEIS: N
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: Killester_Raheny_Clontarf

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

23.00

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	382	14	27.29	33	5
2007/08	388	14	27.71	35	5
2008/09	395	14	28.21	35	5
2009/10	397	14	28.36	34	4
2010/11	403	15	26.87	31	4
2011/12	401	15	26.73	30	2
2012/13	396	15	26.40	30	1
2013/14	387	15	25.80	29	0
2014/15	393	14	28.07	35	3
2015/16	376	14	26.86	34	4
2016/17	374	14	26.71	30	2
2017/18	359	14	25.64	29	0
2019/20	350	14	25.00	29	0
2020/21	323	13	24.85	28	0
2021/22	312	13	24.00	29	0
2022/23	298	13	22.92	31	2
2023/24	307	13	23.62	32	2
2024/25	280	13	21.54	33	1
2025/26	276	12	23.00	34	2

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1976/77: 343 in 1975/76 → 535, +192 pupils.
Biggest loss in a single year: 2024/25: 319 in 2023/24 → 292, -27 pupils.
Largest single-class increase: 3rd Class in 2025/26 (26 → 42, +16).
Largest single-class decrease: Senior Infants in 2021/22 (48 → 24, -24).
Largest cohort-step gain: 2nd → 3rd in 2025/26 (35 → 42, +7).
Largest cohort-step loss: JI → SI in 2022/23 (39 → 34, -5).
Overall: 308 (1974/75) → 287 (2025/26), -21.

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	19	42	30.8	6
Senior Infants	23	48	34.0	6
1st Class	26	46	38.3	6
2nd Class	27	43	36.3	6
3rd Class	26	45	39.0	6
4th Class	28	43	38.7	6
5th Class	36	47	41.3	6
6th Class	36	48	42.7	6
Total	287	535	405.1	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 24

SI 2021/22 24

1st 2022/23 26

2nd 2023/24 27

-1

3rd 2024/25 26

4th 2025/26 28

Cohort 2021/22

JI 2021/22 39

-5

SI 2022/23 34

1st 2023/24 36

-1

2nd 2024/25 35

3rd 2025/26 42

Cohort 2022/23

JI 2022/23 31

SI 2023/24 32

1st 2024/25 33

2nd 2025/26 34

Cohort 2023/24

JI 2023/24 42

SI 2024/25 43

1st 2025/26 45

Cohort 2024/25

JI 2024/25 19

SI 2025/26 23

Cohort 2025/26

JI 2025/26 30

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	–	308	–	–	–	–	–	–	–	–	308
1975/76	–	–	–	–	–	–	–	–	–	–	343
1976/77	–	535	–	–	–	–	–	–	–	–	535
1977/78	–	519	–	–	–	–	–	–	–	–	519
1978/79	–	507	–	–	–	–	–	–	–	–	507
1979/80	–	488	–	–	–	–	–	–	–	–	488
1980/81	–	488	–	–	–	–	–	–	–	–	488
1981/82	–	474	–	–	–	–	–	–	–	–	474
1982/83	–	477	–	–	–	–	–	–	–	–	477
1993/94	–	477	–	–	–	–	–	–	–	–	477
1994/95	–	489	–	–	–	–	–	–	–	–	489
1995/96	–	489	–	–	–	–	–	–	–	–	489
1996/97	–	474	–	–	–	–	–	–	–	–	474
1997/98	–	459	–	–	–	–	–	–	–	–	459
1998/99	–	454	–	–	–	–	–	–	–	–	454
1999/00	–	433	–	–	–	–	–	–	–	–	433
2000/01	–	430	–	–	–	–	–	–	–	–	430
2001/02	–	405	–	–	–	–	–	–	–	–	405
2002/03	–	398	–	–	–	–	–	–	–	–	398
2003/04	–	386	–	–	–	–	–	–	–	–	386
2004/05	–	384	–	–	–	–	–	–	–	–	384
2005/06	–	381	–	–	–	–	–	–	–	–	381
2006/07	–	382	–	–	–	–	–	–	–	–	382
2007/08	–	388	–	–	–	–	–	–	–	–	388
2008/09	–	395	–	–	–	–	–	–	–	–	395
2009/10	–	397	–	–	–	–	–	–	–	–	397
2010/11	–	403	–	–	–	–	–	–	–	–	403
2011/12	–	401	–	–	–	–	–	–	–	–	401
2012/13	–	396	–	–	–	–	–	–	–	–	396
2013/14	–	387	–	–	–	–	–	–	–	–	387
2014/15	–	393	–	–	–	–	–	–	–	–	393
2015/16	–	376	–	–	–	–	–	–	–	–	376
2016/17	–	374	–	–	–	–	–	–	–	–	374
2017/18	–	359	–	–	–	–	–	–	–	–	359
2018/19	–	355	–	–	–	–	–	–	–	–	355
2019/20	–	350	–	–	–	–	–	–	–	–	350
2020/21	–	329	24	48	44	37	41	39	42	48	329
2021/22	–	324	39	24	46	42	39	43	36	43	324
2022/23	–	310	31	34	26	43	41	40	47	36	310
2023/24	–	319	42	32	36	27	45	40	38	47	319
2024/25	–	292	19	43	33	35	26	42	41	41	292
2025/26	–	287	30	23	45	34	42	28	44	41	287