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S N IOGNAID

Roll number: 19371Q Bóithrín na Sliogán, Gaillimh

School details

Address: Bóithrín na Sliogán, Gaillimh (H91E364)
Email: [email protected]
Phone: 091584491
Principal: Louise Breatnach
Ethos: Catholic
DEIS: N
Irish classification: All subjects through Irish
Gaeltacht: N
Island: N
Local authority: Galway City Council
School patron: Bishop of Galway, Kilmacduagh & Kilfenora
School type: Ordinary
School level: All-Through School
Planning area: Galway City

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

24.00

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	520	19	27.37	33	8
2007/08	509	19	26.79	32	6
2008/09	516	19	27.16	32	8
2009/10	528	20	26.40	32	7
2010/11	531	20	26.55	32	8
2011/12	550	20	27.50	36	7
2012/13	567	21	27.00	35	7
2013/14	571	21	27.19	34	7
2014/15	571	21	27.19	34	9
2015/16	579	22	26.32	34	5
2016/17	573	22	26.05	34	6
2017/18	549	21	26.14	34	5
2019/20	539	21	25.67	34	4
2020/21	509	21	24.24	34	5
2021/22	496	20	24.80	31	4
2022/23	502	20	25.10	30	1
2023/24	482	20	24.10	30	2
2024/25	499	20	24.95	31	2
2025/26	480	20	24.00	31	2

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1993/94: 387 in 1983/84 → 540, +153 pupils.
Biggest loss in a single year: 2020/21: 539 in 2019/20 → 509, -30 pupils.
Largest single-class increase: 5th Class in 2023/24 (55 → 76, +21).
Largest single-class decrease: 4th Class in 2021/22 (80 → 54, -26).
Largest cohort-step gain: 1st → 2nd in 2024/25 (50 → 53, +3).
Largest cohort-step loss: 3rd → 4th in 2025/26 (55 → 53, -2).
Overall: 211 (1975/76) → 480 (2025/26), 269.

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	49	71	59.5	6
Senior Infants	48	72	59.5	6
1st Class	50	67	58.5	6
2nd Class	53	71	61.5	6
3rd Class	52	73	59.5	6
4th Class	53	80	64.0	6
5th Class	55	80	65.8	6
6th Class	56	80	66.3	6
Total	207	579	471.5	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 56

SI 2021/22 57

-1

1st 2022/23 56

-1

2nd 2023/24 55

3rd 2024/25 55

-2

4th 2025/26 53

Cohort 2021/22

JI 2021/22 49

-1

SI 2022/23 48

1st 2023/24 50

2nd 2024/25 53

-1

3rd 2025/26 52

Cohort 2022/23

JI 2022/23 69

-2

SI 2023/24 67

1st 2024/25 67

2nd 2025/26 67

Cohort 2023/24

JI 2023/24 54

-1

SI 2024/25 53

1st 2025/26 54

Cohort 2024/25

JI 2024/25 71

SI 2025/26 72

Cohort 2025/26

JI 2025/26 58

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1975/76	–	–	–	–	–	–	–	–	–	–	211
1976/77	–	207	–	–	–	–	–	–	–	–	207
1977/78	–	228	–	–	–	–	–	–	–	–	228
1978/79	–	–	–	–	–	–	–	–	–	–	250
1979/80	–	274	–	–	–	–	–	–	–	–	274
1980/81	–	288	–	–	–	–	–	–	–	–	288
1981/82	–	314	–	–	–	–	–	–	–	–	314
1982/83	–	307	–	–	–	–	–	–	–	–	307
1983/84	15	372	–	–	–	–	–	–	–	–	387
1993/94	231	309	–	–	–	–	–	–	–	–	540
1994/95	232	292	–	–	–	–	–	–	–	–	524
1995/96	218	286	–	–	–	–	–	–	–	–	504
1996/97	219	281	–	–	–	–	–	–	–	–	500
1997/98	230	296	–	–	–	–	–	–	–	–	526
1998/99	233	288	–	–	–	–	–	–	–	–	521
1999/00	230	281	–	–	–	–	–	–	–	–	511
2000/01	230	281	–	–	–	–	–	–	–	–	511
2001/02	231	283	–	–	–	–	–	–	–	–	514
2002/03	229	290	–	–	–	–	–	–	–	–	519
2003/04	232	286	–	–	–	–	–	–	–	–	518
2004/05	235	286	–	–	–	–	–	–	–	–	521
2005/06	226	284	–	–	–	–	–	–	–	–	510
2006/07	230	290	–	–	–	–	–	–	–	–	520
2007/08	221	288	–	–	–	–	–	–	–	–	509
2008/09	222	294	–	–	–	–	–	–	–	–	516
2009/10	231	297	–	–	–	–	–	–	–	–	528
2010/11	233	298	–	–	–	–	–	–	–	–	531
2011/12	233	317	–	–	–	–	–	–	–	–	550
2012/13	238	329	–	–	–	–	–	–	–	–	567
2013/14	237	334	–	–	–	–	–	–	–	–	571
2014/15	239	332	–	–	–	–	–	–	–	–	571
2015/16	243	336	–	–	–	–	–	–	–	–	579
2016/17	239	334	–	–	–	–	–	–	–	–	573
2017/18	234	315	–	–	–	–	–	–	–	–	549
2018/19	231	315	–	–	–	–	–	–	–	–	546
2019/20	233	306	–	–	–	–	–	–	–	–	539
2020/21	219	290	56	60	62	71	54	80	60	66	509
2021/22	223	273	49	57	62	61	73	54	80	60	496
2022/23	228	274	69	48	56	62	59	73	55	80	502
2023/24	220	262	54	67	50	55	64	60	76	56	482
2024/25	229	270	71	53	67	53	55	64	61	75	499
2025/26	222	258	58	72	54	67	52	53	63	61	480