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SN an Spioraid Naiomh C

Roll number: 19209H Sillogue Road, Ballymun, Dublin 11

School details

Address: Sillogue Road, Ballymun, Dublin 11 (D11X26P)
Email: [email protected]
Phone: 018420207
Principal: Emma Conroy
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: FinglasEast_BallymunD11

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

18.69

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	331	16	20.69	26	0
2007/08	326	16	20.38	25	0
2008/09	311	15	20.73	25	0
2009/10	288	15	19.20	26	0
2010/11	279	14	19.93	33	1
2011/12	273	13	21.00	33	2
2012/13	277	13	21.31	32	2
2013/14	273	13	21.00	32	1
2014/15	289	13	22.23	33	1
2015/16	304	14	21.71	33	1
2016/17	324	14	23.14	33	2
2017/18	313	15	20.87	32	1
2019/20	308	15	20.53	28	0
2020/21	287	14	20.50	30	1
2021/22	274	14	19.57	29	0
2022/23	254	14	18.14	27	0
2023/24	254	13	19.54	27	0
2024/25	248	14	17.71	28	0
2025/26	243	13	18.69	28	0

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1976/77: 918 in 1975/76 → 973, +55 pupils.
Biggest loss in a single year: 1993/94: 662 in 1983/84 → 383, -279 pupils.
Largest single-class increase: Senior Infants in 2024/25 (26 → 39, +13).
Largest single-class decrease: 3rd Class in 2021/22 (45 → 29, -16).
Largest cohort-step gain: 1st → 2nd in 2025/26 (27 → 32, +5).
Largest cohort-step loss: 3rd → 4th in 2021/22 (45 → 42, -3).
Overall: 1035 (1974/75) → 249 (2025/26), -786.

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	24	36	29.0	6
Senior Infants	24	39	30.2	6
1st Class	23	38	31.2	6
2nd Class	25	39	31.3	6
3rd Class	25	45	33.0	6
4th Class	27	42	33.5	6
5th Class	27	45	35.5	6
6th Class	28	45	37.3	6
Total	249	1035	460.2	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 29

SI 2021/22 30

1st 2022/23 32

2nd 2023/24 35

-2

3rd 2024/25 33

-1

4th 2025/26 32

Cohort 2021/22

JI 2021/22 24

SI 2022/23 24

-1

1st 2023/24 23

2nd 2024/25 25

3rd 2025/26 25

Cohort 2022/23

JI 2022/23 27

-1

SI 2023/24 26

1st 2024/25 27

2nd 2025/26 32

Cohort 2023/24

JI 2023/24 36

SI 2024/25 39

-1

1st 2025/26 38

Cohort 2024/25

JI 2024/25 31

SI 2025/26 32

Cohort 2025/26

JI 2025/26 27

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	1035	–	–	–	–	–	–	–	–	–	1035
1975/76	–	–	–	–	–	–	–	–	–	–	918
1976/77	973	–	–	–	–	–	–	–	–	–	973
1977/78	956	–	–	–	–	–	–	–	–	–	956
1978/79	–	–	–	–	–	–	–	–	–	–	973
1979/80	909	–	–	–	–	–	–	–	–	–	909
1980/81	864	–	–	–	–	–	–	–	–	–	864
1981/82	834	–	–	–	–	–	–	–	–	–	834
1982/83	741	–	–	–	–	–	–	–	–	–	741
1983/84	662	–	–	–	–	–	–	–	–	–	662
1993/94	383	–	–	–	–	–	–	–	–	–	383
1994/95	376	–	–	–	–	–	–	–	–	–	376
1995/96	372	–	–	–	–	–	–	–	–	–	372
1996/97	378	–	–	–	–	–	–	–	–	–	378
1997/98	397	–	–	–	–	–	–	–	–	–	397
1998/99	425	–	–	–	–	–	–	–	–	–	425
1999/00	421	–	–	–	–	–	–	–	–	–	421
2000/01	404	–	–	–	–	–	–	–	–	–	404
2001/02	401	–	–	–	–	–	–	–	–	–	401
2002/03	400	–	–	–	–	–	–	–	–	–	400
2003/04	382	–	–	–	–	–	–	–	–	–	382
2004/05	375	–	–	–	–	–	–	–	–	–	375
2005/06	354	–	–	–	–	–	–	–	–	–	354
2006/07	346	–	–	–	–	–	–	–	–	–	346
2007/08	339	–	–	–	–	–	–	–	–	–	339
2008/09	323	–	–	–	–	–	–	–	–	–	323
2009/10	300	–	–	–	–	–	–	–	–	–	300
2010/11	285	–	–	–	–	–	–	–	–	–	285
2011/12	273	–	–	–	–	–	–	–	–	–	273
2012/13	277	–	–	–	–	–	–	–	–	–	277
2013/14	273	–	–	–	–	–	–	–	–	–	273
2014/15	289	–	–	–	–	–	–	–	–	–	289
2015/16	304	–	–	–	–	–	–	–	–	–	304
2016/17	324	–	–	–	–	–	–	–	–	–	324
2017/18	313	–	–	–	–	–	–	–	–	–	313
2018/19	318	–	–	–	–	–	–	–	–	–	318
2019/20	308	–	–	–	–	–	–	–	–	–	308
2020/21	287	–	29	30	38	29	45	36	45	35	287
2021/22	274	–	24	30	29	39	29	42	36	45	274
2022/23	259	–	27	24	32	28	37	27	41	38	259
2023/24	260	–	36	26	23	35	29	35	27	43	260
2024/25	254	–	31	39	27	25	33	29	36	28	254
2025/26	249	–	27	32	38	32	25	32	28	35	249