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ST BRIGIDS N S

Roll number: 16794G Merville Road, Stillorgan, Co. Dublin

School details

Address: Merville Road, Stillorgan, Co. Dublin (A94X066)
Email: [email protected]
Phone: 012833095
Principal: Dawn Galbraith
Ethos: Church Of Ireland
DEIS: N
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: Dun Laoghaire Rathdown
School patron: Archbishop of Dublin & Bishop of Glendalough COI
School type: Ordinary
School level: All-Through School
Planning area: Goatstown_Stillorgan_DLR

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

25.00

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
2006/07	90	4	22.50	27
2007/08	89	4	22.25	25
2008/09	84	4	21.00	22
2009/10	90	4	22.50	29
2010/11	87	4	21.75	28
2011/12	85	4	21.25	27
2012/13	87	4	21.75	26
2013/14	96	4	24.00	27
2014/15	98	4	24.50	28
2015/16	99	4	24.75	27
2016/17	98	4	24.50	26
2017/18	92	4	23.00	25
2019/20	101	4	25.25	26
2020/21	97	5	19.40	28
2021/22	102	4	25.50	26
2022/23	102	5	20.40	25
2023/24	99	4	24.75	28
2024/25	102	4	25.50	26
2025/26	100	4	25.00	27

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1981/82: 98 in 1980/81 → 129, +31 pupils.
Biggest loss in a single year: 2004/05: 116 in 2003/04 → 98, -18 pupils.
Largest single-class increase: Junior Infants in 2024/25 (8 → 14, +6).
Largest single-class decrease: 1st Class in 2021/22 (15 → 11, -4).
Largest cohort-step gain: JI → SI in 2024/25 (8 → 11, +3).
Largest cohort-step loss: 5th → 6th in 2023/24 (14 → 12, -2).
Overall: 82 (1974/75) → 100 (2025/26), 18.

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	8	14	12.0	6
Senior Infants	9	15	12.2	6
1st Class	11	15	12.8	6
2nd Class	11	14	12.8	6
3rd Class	12	14	12.7	6
4th Class	12	14	12.8	6
5th Class	12	14	13.0	6
6th Class	11	14	12.0	6
Total	78	153	105.7	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 12

SI 2021/22 12

1st 2022/23 13

2nd 2023/24 13

3rd 2024/25 13

4th 2025/26 13

Cohort 2021/22

JI 2021/22 14

SI 2022/23 15

1st 2023/24 15

-1

2nd 2024/25 14

3rd 2025/26 14

Cohort 2022/23

JI 2022/23 12

SI 2023/24 13

-1

1st 2024/25 12

-1

2nd 2025/26 11

Cohort 2023/24

JI 2023/24 8

SI 2024/25 11

1st 2025/26 11

Cohort 2024/25

JI 2024/25 14

-1

SI 2025/26 13

Cohort 2025/26

JI 2025/26 12

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	38	44	–	–	–	–	–	–	–	–	82
1975/76	–	–	–	–	–	–	–	–	–	–	89
1976/77	39	49	–	–	–	–	–	–	–	–	88
1977/78	37	47	–	–	–	–	–	–	–	–	84
1978/79	–	–	–	–	–	–	–	–	–	–	78
1979/80	38	53	–	–	–	–	–	–	–	–	91
1980/81	46	52	–	–	–	–	–	–	–	–	98
1981/82	69	60	–	–	–	–	–	–	–	–	129
1982/83	70	71	–	–	–	–	–	–	–	–	141
1983/84	70	69	–	–	–	–	–	–	–	–	139
1993/94	66	80	–	–	–	–	–	–	–	–	146
1994/95	67	82	–	–	–	–	–	–	–	–	149
1995/96	67	86	–	–	–	–	–	–	–	–	153
1996/97	63	77	–	–	–	–	–	–	–	–	140
1997/98	60	71	–	–	–	–	–	–	–	–	131
1998/99	63	59	–	–	–	–	–	–	–	–	122
1999/00	66	59	–	–	–	–	–	–	–	–	125
2000/01	60	58	–	–	–	–	–	–	–	–	118
2001/02	57	61	–	–	–	–	–	–	–	–	118
2002/03	58	63	–	–	–	–	–	–	–	–	121
2003/04	61	55	–	–	–	–	–	–	–	–	116
2004/05	56	42	–	–	–	–	–	–	–	–	98
2005/06	48	45	–	–	–	–	–	–	–	–	93
2006/07	39	51	–	–	–	–	–	–	–	–	90
2007/08	41	48	–	–	–	–	–	–	–	–	89
2008/09	38	46	–	–	–	–	–	–	–	–	84
2009/10	44	46	–	–	–	–	–	–	–	–	90
2010/11	44	43	–	–	–	–	–	–	–	–	87
2011/12	40	45	–	–	–	–	–	–	–	–	85
2012/13	44	43	–	–	–	–	–	–	–	–	87
2013/14	50	46	–	–	–	–	–	–	–	–	96
2014/15	45	53	–	–	–	–	–	–	–	–	98
2015/16	50	49	–	–	–	–	–	–	–	–	99
2016/17	48	50	–	–	–	–	–	–	–	–	98
2017/18	50	42	–	–	–	–	–	–	–	–	92
2018/19	51	49	–	–	–	–	–	–	–	–	100
2019/20	48	53	–	–	–	–	–	–	–	–	101
2020/21	46	51	12	9	15	13	12	12	13	11	97
2021/22	49	53	14	12	11	14	12	13	12	14	102
2022/23	46	56	12	15	13	12	13	12	14	11	102
2023/24	39	60	8	13	15	13	12	14	12	12	99
2024/25	45	57	14	11	12	14	13	13	14	11	102
2025/26	44	56	12	13	11	11	14	13	13	13	100