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ST JOSEPHS JNR

Roll number: 19431I St Joseph's Junior National School, Balbutcher Lane, Ballymun, Dublin 11

School details

Address: St Joseph's Junior National School, Balbutcher Lane, Ballymun, Dublin 11 (D11ND82)
Email: [email protected]
Phone: 018421801
Principal: Jennie McGee
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: Junior
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

16.50

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	116	11	10.55	13
2007/08	109	9	12.11	14
2008/09	104	10	10.40	13
2009/10	138	9	15.33	18
2010/11	97	9	10.78	15
2011/12	140	9	15.56	17
2012/13	138	8	17.25	20
2013/14	144	8	18.00	21
2014/15	149	8	18.62	20
2015/16	142	8	17.75	20
2016/17	148	8	18.50	20
2017/18	146	8	18.25	20
2019/20	154	9	17.11	21
2020/21	145	8	18.12	20
2021/22	151	8	18.88	20
2022/23	148	8	18.50	20
2023/24	145	8	18.12	21
2024/25	150	8	18.75	20
2025/26	132	8	16.50	18

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1976/77: 445 in 1975/76 → 765, +320 pupils.
Biggest loss in a single year: 1977/78: 765 in 1976/77 → 581, -184 pupils.
Largest single-class increase: Junior Infants in 2021/22 (34 → 40, +6).
Largest single-class decrease: 1st Class in 2025/26 (40 → 34, -6).
Largest cohort-step gain: JI → SI in 2023/24 (35 → 42, +7).
Largest cohort-step loss: 2nd → 3rd in 2025/26 (40 → 0, -40).
Overall: 352 (1974/75) → 138 (2025/26), -214.

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	34	40	35.7	6
Senior Infants	34	42	38.0	6
1st Class	34	40	37.2	6
2nd Class	35	40	37.0	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	138	765	261.9	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 34

SI 2021/22 36

1st 2022/23 36

-1

2nd 2023/24 35

-35

3rd 2024/25 0

4th 2025/26 0

Cohort 2021/22

JI 2021/22 40

-1

SI 2022/23 39

-1

1st 2023/24 38

2nd 2024/25 40

-40

3rd 2025/26 0

Cohort 2022/23

JI 2022/23 35

SI 2023/24 42

-2

1st 2024/25 40

-4

2nd 2025/26 36

Cohort 2023/24

JI 2023/24 34

SI 2024/25 39

-5

1st 2025/26 34

Cohort 2024/25

JI 2024/25 37

-3

SI 2025/26 34

Cohort 2025/26

JI 2025/26 34

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	188	164	–	–	–	–	–	–	–	–	352
1975/76	–	–	–	–	–	–	–	–	–	–	445
1976/77	349	416	–	–	–	–	–	–	–	–	765
1977/78	259	322	–	–	–	–	–	–	–	–	581
1978/79	271	317	–	–	–	–	–	–	–	–	588
1979/80	266	314	–	–	–	–	–	–	–	–	580
1980/81	249	307	–	–	–	–	–	–	–	–	556
1981/82	247	269	–	–	–	–	–	–	–	–	516
1982/83	213	267	–	–	–	–	–	–	–	–	480
1993/94	143	172	–	–	–	–	–	–	–	–	315
1994/95	136	153	–	–	–	–	–	–	–	–	289
1995/96	118	157	–	–	–	–	–	–	–	–	275
1996/97	115	152	–	–	–	–	–	–	–	–	267
1997/98	101	152	–	–	–	–	–	–	–	–	253
1998/99	106	142	–	–	–	–	–	–	–	–	248
1999/00	114	145	–	–	–	–	–	–	–	–	259
2000/01	105	136	–	–	–	–	–	–	–	–	241
2001/02	109	130	–	–	–	–	–	–	–	–	239
2002/03	111	116	–	–	–	–	–	–	–	–	227
2003/04	99	116	–	–	–	–	–	–	–	–	215
2004/05	93	99	–	–	–	–	–	–	–	–	192
2005/06	88	93	–	–	–	–	–	–	–	–	181
2006/07	75	85	–	–	–	–	–	–	–	–	160
2007/08	81	75	–	–	–	–	–	–	–	–	156
2008/09	73	78	–	–	–	–	–	–	–	–	151
2009/10	71	67	–	–	–	–	–	–	–	–	138
2010/11	74	66	–	–	–	–	–	–	–	–	140
2011/12	68	72	–	–	–	–	–	–	–	–	140
2012/13	65	73	–	–	–	–	–	–	–	–	138
2013/14	71	73	–	–	–	–	–	–	–	–	144
2014/15	70	79	–	–	–	–	–	–	–	–	149
2015/16	74	68	–	–	–	–	–	–	–	–	142
2016/17	71	77	–	–	–	–	–	–	–	–	148
2017/18	61	85	–	–	–	–	–	–	–	–	146
2018/19	61	80	–	–	–	–	–	–	–	–	141
2019/20	66	88	–	–	–	–	–	–	–	–	154
2020/21	56	89	34	38	35	38	–	–	–	–	145
2021/22	66	85	40	36	40	35	–	–	–	–	151
2022/23	60	88	35	39	36	38	–	–	–	–	148
2023/24	61	88	34	42	38	35	–	–	–	–	149
2024/25	80	76	37	39	40	40	–	–	–	–	156
2025/26	68	70	34	34	34	36	–	–	–	–	138