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S N NAOMH LORCAN

Roll number: 16893I Upper Kilmacud Road, Stillorgan, Co. Dublin

School details

Address: Upper Kilmacud Road, Stillorgan, Co. Dublin (A94KD62)
Email: [email protected]
Phone: 012882486
Principal: Damian Moran
Ethos: Catholic
DEIS: N
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: Dun Laoghaire Rathdown
School patron: Archbishop of Dublin
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

24.38

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	421	15	28.07	33	7
2007/08	438	16	27.38	33	5
2008/09	439	16	27.44	32	5
2009/10	432	16	27.00	32	4
2010/11	432	16	27.00	32	2
2011/12	434	16	27.12	31	3
2012/13	456	16	28.50	33	5
2013/14	457	16	28.56	32	6
2014/15	451	16	28.19	32	6
2015/16	444	16	27.75	31	7
2016/17	439	16	27.44	32	4
2017/18	448	16	28.00	31	4
2019/20	447	17	26.29	30	3
2020/21	438	17	25.76	32	4
2021/22	438	17	25.76	31	2
2022/23	421	17	24.76	30	4
2023/24	414	17	24.35	32	4
2024/25	402	17	23.65	28	0
2025/26	390	16	24.38	29	0

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 2005/06: 393 in 2004/05 → 418, +25 pupils.
Biggest loss in a single year: 1983/84: 481 in 1982/83 → 442, -39 pupils.
Largest single-class increase: Senior Infants in 2024/25 (37 → 50, +13).
Largest single-class decrease: Senior Infants in 2023/24 (54 → 37, -17).
Largest cohort-step gain: SI → 1st in 2024/25 (37 → 43, +6).
Largest cohort-step loss: 5th → 6th in 2024/25 (62 → 56, -6).
Overall: 658 (1974/75) → 390 (2025/26), -268.

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	38	51	46.8	6
Senior Infants	37	54	48.7	6
1st Class	43	54	49.8	6
2nd Class	42	60	52.5	6
3rd Class	49	58	53.5	6
4th Class	51	62	55.5	6
5th Class	50	62	56.5	6
6th Class	45	60	53.8	6
Total	390	658	454.1	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 51

-1

SI 2021/22 50

-1

1st 2022/23 49

2nd 2023/24 53

-1

3rd 2024/25 52

-1

4th 2025/26 51

Cohort 2021/22

JI 2021/22 51

SI 2022/23 54

1st 2023/24 54

2nd 2024/25 55

3rd 2025/26 57

Cohort 2022/23

JI 2022/23 38

-1

SI 2023/24 37

1st 2024/25 43

-1

2nd 2025/26 42

Cohort 2023/24

JI 2023/24 46

SI 2024/25 50

-3

1st 2025/26 47

Cohort 2024/25

JI 2024/25 45

SI 2025/26 47

Cohort 2025/26

JI 2025/26 50

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	–	658	–	–	–	–	–	–	–	–	658
1975/76	–	–	–	–	–	–	–	–	–	–	632
1976/77	–	621	–	–	–	–	–	–	–	–	621
1977/78	–	602	–	–	–	–	–	–	–	–	602
1979/80	–	568	–	–	–	–	–	–	–	–	568
1980/81	–	543	–	–	–	–	–	–	–	–	543
1981/82	–	516	–	–	–	–	–	–	–	–	516
1982/83	–	481	–	–	–	–	–	–	–	–	481
1983/84	–	442	–	–	–	–	–	–	–	–	442
1993/94	–	406	–	–	–	–	–	–	–	–	406
1994/95	–	405	–	–	–	–	–	–	–	–	405
1995/96	–	414	–	–	–	–	–	–	–	–	414
1996/97	–	421	–	–	–	–	–	–	–	–	421
1997/98	–	401	–	–	–	–	–	–	–	–	401
1998/99	–	415	–	–	–	–	–	–	–	–	415
1999/00	–	414	–	–	–	–	–	–	–	–	414
2000/01	–	407	–	–	–	–	–	–	–	–	407
2001/02	–	409	–	–	–	–	–	–	–	–	409
2002/03	–	416	–	–	–	–	–	–	–	–	416
2003/04	–	400	–	–	–	–	–	–	–	–	400
2004/05	–	393	–	–	–	–	–	–	–	–	393
2005/06	–	418	–	–	–	–	–	–	–	–	418
2006/07	–	421	–	–	–	–	–	–	–	–	421
2007/08	–	438	–	–	–	–	–	–	–	–	438
2008/09	–	439	–	–	–	–	–	–	–	–	439
2009/10	–	432	–	–	–	–	–	–	–	–	432
2010/11	–	432	–	–	–	–	–	–	–	–	432
2011/12	–	434	–	–	–	–	–	–	–	–	434
2012/13	–	456	–	–	–	–	–	–	–	–	456
2013/14	–	457	–	–	–	–	–	–	–	–	457
2014/15	–	451	–	–	–	–	–	–	–	–	451
2015/16	–	444	–	–	–	–	–	–	–	–	444
2016/17	–	439	–	–	–	–	–	–	–	–	439
2017/18	–	448	–	–	–	–	–	–	–	–	448
2018/19	–	450	–	–	–	–	–	–	–	–	450
2019/20	–	447	–	–	–	–	–	–	–	–	447
2020/21	–	438	51	54	52	60	55	62	55	49	438
2021/22	–	438	51	50	54	52	58	57	61	55	438
2022/23	–	421	38	54	49	53	50	59	60	58	421
2023/24	–	414	46	37	54	53	49	53	62	60	414
2024/25	–	402	45	50	43	55	52	51	50	56	402
2025/26	–	390	50	47	47	42	57	51	51	45	390