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ST HELENS JUNIOR N S

Roll number: 19578P Martello, Portmarnock, Co. Dublin

School details

Address: Martello, Portmarnock, Co. Dublin (D13KP93)
Email: [email protected]
Phone: 018461763
Principal: Lorna M Lavin
Ethos: Catholic
DEIS: N
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: Fingal County Council
School patron: Archbishop of Dublin
School type: Ordinary with Special Classes
School level: Junior
Planning area: Portmarnock

Preliminary data

The latest year shown (2025/26) is preliminary and subject to revision when the official enrolment figures are released by the Department of Education.

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1979/80: 77 in 1977/78 → 273, +196 pupils.
Biggest loss in a single year: 1993/94: 613 in 1983/84 → 290, -323 pupils.
Largest single-class increase: Junior Infants in 2024/25 (62 → 76, +14).
Largest single-class decrease: Junior Infants in 2023/24 (80 → 62, -18).
Largest cohort-step gain: 1st → 2nd in 2024/25 (76 → 85, +9).
Largest cohort-step loss: 2nd → 3rd in 2023/24 (90 → 0, -90).
Overall: 77 (1977/78) → 319 (2025/26 (preliminary)), 242.

Summary statistics (class-level data)

Min / max / mean enrolment per class across the available years (2020/21–2024/25; preliminary year excluded from class stats).

Class	Min	Max	Mean	Years
Junior Infants	62	80	72.0	5
Senior Infants	69	83	75.8	5
1st Class	75	86	80.0	5
2nd Class	75	90	82.6	5
Total	77	613	310.7	39

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 75

-1

SI 2021/22 74

1st 2022/23 75

2nd 2023/24 75

-75

3rd 2024/25 0

Cohort 2021/22

JI 2021/22 67

SI 2022/23 71

1st 2023/24 76

2nd 2024/25 85

Cohort 2022/23

JI 2022/23 80

SI 2023/24 83

-1

1st 2024/25 82

Cohort 2023/24

JI 2023/24 62

SI 2024/25 69

Cohort 2024/25

JI 2024/25 76

Raw data by year

Years marked (preliminary) are subject to revision when official data are published.

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1977/78	34	43	–	–	–	–	–	–	–	–	77
1979/80	130	143	–	–	–	–	–	–	–	–	273
1980/81	203	225	–	–	–	–	–	–	–	–	428
1981/82	245	254	–	–	–	–	–	–	–	–	499
1982/83	267	279	–	–	–	–	–	–	–	–	546
1983/84	292	321	–	–	–	–	–	–	–	–	613
1993/94	134	156	–	–	–	–	–	–	–	–	290
1994/95	119	142	–	–	–	–	–	–	–	–	261
1995/96	125	144	–	–	–	–	–	–	–	–	269
1996/97	115	148	–	–	–	–	–	–	–	–	263
1997/98	125	151	–	–	–	–	–	–	–	–	276
1998/99	122	152	–	–	–	–	–	–	–	–	274
1999/00	120	144	–	–	–	–	–	–	–	–	264
2000/01	125	148	–	–	–	–	–	–	–	–	273
2001/02	138	143	–	–	–	–	–	–	–	–	281
2002/03	113	142	–	–	–	–	–	–	–	–	255
2003/04	117	144	–	–	–	–	–	–	–	–	261
2004/05	109	138	–	–	–	–	–	–	–	–	247
2005/06	101	123	–	–	–	–	–	–	–	–	224
2006/07	102	133	–	–	–	–	–	–	–	–	235
2007/08	106	134	–	–	–	–	–	–	–	–	240
2008/09	104	140	–	–	–	–	–	–	–	–	244
2009/10	116	147	–	–	–	–	–	–	–	–	263
2010/11	125	146	–	–	–	–	–	–	–	–	271
2011/12	136	153	–	–	–	–	–	–	–	–	289
2012/13	147	164	–	–	–	–	–	–	–	–	311
2013/14	142	183	–	–	–	–	–	–	–	–	325
2014/15	146	195	–	–	–	–	–	–	–	–	341
2015/16	148	192	–	–	–	–	–	–	–	–	340
2016/17	157	205	–	–	–	–	–	–	–	–	362
2017/18	161	192	–	–	–	–	–	–	–	–	353
2018/19	167	184	–	–	–	–	–	–	–	–	351
2019/20	166	191	–	–	–	–	–	–	–	–	357
2020/21	156	180	75	82	81	80	–	–	–	–	336
2021/22	160	168	67	74	86	83	–	–	–	–	328
2022/23	166	168	80	71	75	90	–	–	–	–	334
2023/24	156	158	62	83	76	75	–	–	–	–	314
2024/25	177	153	76	69	82	85	–	–	–	–	330
2025/26 (preliminary)	171	148	–	–	–	–	–	–	–	–	319