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ST PHILIP THE APOSTLE JUNIOR N S

Roll number: 19601H Mountview, Clonsilla, Dublin 15

School details

Address: Mountview, Clonsilla, Dublin 15 (D15V124)
Email: [email protected]
Phone: 018212992
Principal: Jane O'Connell
Ethos: Catholic
DEIS: Y
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: BlanchardstownVge_D15

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

15.64

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	277	14	19.79	22
2007/08	285	14	20.36	22
2008/09	288	14	20.57	22
2009/10	297	14	21.21	22
2010/11	295	14	21.07	23
2011/12	296	14	21.14	22
2012/13	293	14	20.93	22
2013/14	290	14	20.71	23
2014/15	292	14	20.86	23
2015/16	293	14	20.93	23
2016/17	281	14	20.07	23
2017/18	288	15	19.20	23
2019/20	260	15	17.33	23
2020/21	249	13	19.15	23
2021/22	231	13	17.77	23
2022/23	206	13	15.85	20
2023/24	190	12	15.83	19
2024/25	189	11	17.18	20
2025/26	172	11	15.64	21

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1979/80: 42 in 1978/79 → 491, +449 pupils.
Biggest loss in a single year: 1993/94: 548 in 1983/84 → 354, -194 pupils.
Largest single-class increase: Senior Infants in 2022/23 (50 → 62, +12).
Largest single-class decrease: Senior Infants in 2023/24 (62 → 39, -23).
Largest cohort-step gain: JI → SI in 2025/26 (47 → 52, +5).
Largest cohort-step loss: 2nd → 3rd in 2022/23 (67 → 0, -67).
Overall: 42 (1978/79) → 184 (2025/26), 142.

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	39	59	50.0	6
Senior Infants	39	62	51.3	6
1st Class	38	69	52.5	6
2nd Class	40	67	55.3	6
3rd Class	0	0	0.0	1
4th Class	0	0	0.0	1
5th Class	0	0	0.0	1
6th Class	0	0	0.0	1
Total	42	661	298.7	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 59

-9

SI 2021/22 50

-2

1st 2022/23 48

2nd 2023/24 48

-48

3rd 2024/25 0

4th 2025/26 0

Cohort 2021/22

JI 2021/22 59

SI 2022/23 62

-2

1st 2023/24 60

-4

2nd 2024/25 56

-56

3rd 2025/26 0

Cohort 2022/23

JI 2022/23 39

SI 2023/24 39

-1

1st 2024/25 38

2nd 2025/26 40

Cohort 2023/24

JI 2023/24 49

-1

SI 2024/25 48

-3

1st 2025/26 45

Cohort 2024/25

JI 2024/25 47

SI 2025/26 52

Cohort 2025/26

JI 2025/26 47

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1978/79	–	–	–	–	–	–	–	–	–	–	42
1979/80	232	259	–	–	–	–	–	–	–	–	491
1980/81	280	313	–	–	–	–	–	–	–	–	593
1981/82	319	342	–	–	–	–	–	–	–	–	661
1982/83	247	256	–	–	–	–	–	–	–	–	503
1983/84	279	269	–	–	–	–	–	–	–	–	548
1993/94	174	180	–	–	–	–	–	–	–	–	354
1994/95	162	143	–	–	–	–	–	–	–	–	305
1995/96	151	147	–	–	–	–	–	–	–	–	298
1996/97	131	159	–	–	–	–	–	–	–	–	290
1997/98	114	131	–	–	–	–	–	–	–	–	245
1998/99	101	139	–	–	–	–	–	–	–	–	240
1999/00	105	128	–	–	–	–	–	–	–	–	233
2000/01	95	137	–	–	–	–	–	–	–	–	232
2001/02	110	123	–	–	–	–	–	–	–	–	233
2002/03	120	129	–	–	–	–	–	–	–	–	249
2003/04	135	129	–	–	–	–	–	–	–	–	264
2004/05	147	134	–	–	–	–	–	–	–	–	281
2005/06	140	144	–	–	–	–	–	–	–	–	284
2006/07	140	145	–	–	–	–	–	–	–	–	285
2007/08	134	154	–	–	–	–	–	–	–	–	288
2008/09	134	157	–	–	–	–	–	–	–	–	291
2009/10	130	168	–	–	–	–	–	–	–	–	298
2010/11	134	161	–	–	–	–	–	–	–	–	295
2011/12	142	154	–	–	–	–	–	–	–	–	296
2012/13	150	143	–	–	–	–	–	–	–	–	293
2013/14	154	136	–	–	–	–	–	–	–	–	290
2014/15	142	150	–	–	–	–	–	–	–	–	292
2015/16	143	150	–	–	–	–	–	–	–	–	293
2016/17	134	147	–	–	–	–	–	–	–	–	281
2017/18	137	151	–	–	–	–	–	–	–	–	288
2018/19	140	148	–	–	–	–	–	–	–	–	288
2019/20	124	136	–	–	–	–	–	–	–	–	260
2020/21	114	135	59	57	69	64	–	–	–	–	249
2021/22	110	121	59	50	55	67	–	–	–	–	231
2022/23	101	105	39	62	48	57	–	–	–	–	206
2023/24	102	94	49	39	60	48	–	–	–	–	196
2024/25	97	104	47	48	38	56	–	–	–	–	201
2025/26	87	97	47	52	45	40	–	–	–	–	184