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ST THOMAS JUNIOR N S

Roll number: 19702N Fortunestown Road, Tallaght, Dublin 24

School details

Address: Fortunestown Road, Tallaght, Dublin 24 (D24X577)
Email: [email protected]
Phone: 014525855
Principal: Suzanne O'Reilly
Ethos: Catholic
DEIS: Y
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: South Dublin County Council
School patron: Archbishop of Dublin
School type: Ordinary
School level: Junior
Planning area: Tallaght

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: 1981/82: 247 in 1980/81 → 512, +265 pupils.
Biggest loss in a single year: 1983/84: 692 in 1982/83 → 600, -92 pupils.
Largest single-class increase: Senior Infants in 2023/24 (71 → 84, +13).
Largest single-class decrease: 2nd Class in 2022/23 (97 → 81, -16).
Largest cohort-step gain: 1st → 2nd in 2021/22 (91 → 97, +6).
Largest cohort-step loss: 2nd → 3rd in 2022/23 (97 → 0, -97).
Overall: 247 (1980/81) → 300 (2025/26 (preliminary)), 53.

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	70	85	77.8	5
Senior Infants	71	84	78.4	5
1st Class	71	91	80.0	5
2nd Class	72	97	84.4	5
Total	247	692	424.2	37

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 76

SI 2021/22 76

-3

1st 2022/23 73

-1

2nd 2023/24 72

-72

3rd 2024/25 0

Cohort 2021/22

JI 2021/22 77

-6

SI 2022/23 71

1st 2023/24 71

2nd 2024/25 76

Cohort 2022/23

JI 2022/23 85

-1

SI 2023/24 84

-1

1st 2024/25 83

Cohort 2023/24

JI 2023/24 81

-2

SI 2024/25 79

Cohort 2024/25

JI 2024/25 70

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
1980/81	121	126	–	–	–	–	–	–	–	–	247
1981/82	244	268	–	–	–	–	–	–	–	–	512
1982/83	329	363	–	–	–	–	–	–	–	–	692
1983/84	264	336	–	–	–	–	–	–	–	–	600
1993/94	253	335	–	–	–	–	–	–	–	–	588
1994/95	251	295	–	–	–	–	–	–	–	–	546
1995/96	248	259	–	–	–	–	–	–	–	–	507
1996/97	230	232	–	–	–	–	–	–	–	–	462
1997/98	240	230	–	–	–	–	–	–	–	–	470
1998/99	233	216	–	–	–	–	–	–	–	–	449
1999/00	214	216	–	–	–	–	–	–	–	–	430
2000/01	208	193	–	–	–	–	–	–	–	–	401
2001/02	196	200	–	–	–	–	–	–	–	–	396
2002/03	185	209	–	–	–	–	–	–	–	–	394
2003/04	181	199	–	–	–	–	–	–	–	–	380
2004/05	168	204	–	–	–	–	–	–	–	–	372
2005/06	188	212	–	–	–	–	–	–	–	–	400
2006/07	198	239	–	–	–	–	–	–	–	–	437
2007/08	213	260	–	–	–	–	–	–	–	–	473
2008/09	235	239	–	–	–	–	–	–	–	–	474
2009/10	227	242	–	–	–	–	–	–	–	–	469
2010/11	224	242	–	–	–	–	–	–	–	–	466
2011/12	206	227	–	–	–	–	–	–	–	–	433
2012/13	202	227	–	–	–	–	–	–	–	–	429
2013/14	210	222	–	–	–	–	–	–	–	–	432
2014/15	199	220	–	–	–	–	–	–	–	–	419
2015/16	195	219	–	–	–	–	–	–	–	–	414
2016/17	181	211	–	–	–	–	–	–	–	–	392
2017/18	173	204	–	–	–	–	–	–	–	–	377
2018/19	171	197	–	–	–	–	–	–	–	–	368
2019/20	184	178	–	–	–	–	–	–	–	–	362
2020/21	189	156	76	82	91	96	–	–	–	–	345
2021/22	175	157	77	76	82	97	–	–	–	–	332
2022/23	167	143	85	71	73	81	–	–	–	–	310
2023/24	155	153	81	84	71	72	–	–	–	–	308
2024/25	152	156	70	79	83	76	–	–	–	–	308
2025/26 (preliminary)	150	150	–	–	–	–	–	–	–	–	300