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SCOIL COLMCILLE NAOFA

Roll number: 19474D Idrone Avenue, Knocklyon, Dublin 16

School details

Address: Idrone Avenue, Knocklyon, Dublin 16 (D16H337)
Email: [email protected]
Phone: 014947422
Principal: David Curtin
Ethos: Catholic
DEIS: N
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: Rathfarnham

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

24.66

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	695	24	28.96	31	7
2007/08	666	24	27.75	29	0
2008/09	666	24	27.75	29	0
2009/10	682	25	27.28	29	0
2010/11	706	26	27.15	30	2
2011/12	731	26	28.12	29	0
2012/13	757	27	28.04	29	0
2013/14	762	27	28.22	29	0
2014/15	792	28	28.29	29	0
2015/16	815	29	28.10	30	7
2016/17	827	30	27.57	31	2
2017/18	817	30	27.23	31	2
2019/20	788	29	27.17	30	1
2020/21	776	29	26.76	29	0
2021/22	766	29	26.41	27	0
2022/23	769	29	26.52	28	0
2023/24	756	29	26.07	27	0
2024/25	732	29	25.24	27	0
2025/26	715	29	24.66	26	0

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 1993/94: 565 in 1983/84 → 751, +186 pupils.
Biggest loss in a single year: 1982/83: 744 in 1981/82 → 540, -204 pupils.
Largest single-class increase: Junior Infants in 2022/23 (189 → 205, +16).
Largest single-class decrease: Senior Infants in 2024/25 (204 → 175, -29).
Largest cohort-step gain: SI → 1st in 2025/26 (175 → 179, +4).
Largest cohort-step loss: 2nd → 3rd in 2022/23 (201 → 0, -201).
Overall: 103 (1976/77) → 721 (2025/26), 618.

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	170	205	185.5	6
Senior Infants	164	204	184.5	6
1st Class	179	205	191.2	6
2nd Class	182	201	192.2	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	103	827	698.7	41

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 2020/21 189

-2

SI 2021/22 187

-2

1st 2022/23 185

-3

2nd 2023/24 182

-182

3rd 2024/25 0

4th 2025/26 0

Cohort 2021/22

JI 2021/22 189

SI 2022/23 189

1st 2023/24 189

-2

2nd 2024/25 187

-187

3rd 2025/26 0

Cohort 2022/23

JI 2022/23 205

-1

SI 2023/24 204

-4

1st 2024/25 200

-1

2nd 2025/26 199

Cohort 2023/24

JI 2023/24 181

-6

SI 2024/25 175

1st 2025/26 179

Cohort 2024/25

JI 2024/25 170

-6

SI 2025/26 164

Cohort 2025/26

JI 2025/26 179

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1976/77	45	58	–	–	–	–	–	–	–	–	103
1977/78	115	144	–	–	–	–	–	–	–	–	259
1978/79	–	–	–	–	–	–	–	–	–	–	392
1979/80	199	297	–	–	–	–	–	–	–	–	496
1980/81	251	357	–	–	–	–	–	–	–	–	608
1981/82	300	444	–	–	–	–	–	–	–	–	744
1982/83	208	332	–	–	–	–	–	–	–	–	540
1983/84	234	331	–	–	–	–	–	–	–	–	565
1993/94	321	430	–	–	–	–	–	–	–	–	751
1994/95	333	411	–	–	–	–	–	–	–	–	744
1995/96	359	423	–	–	–	–	–	–	–	–	782
1996/97	388	429	–	–	–	–	–	–	–	–	817
1997/98	389	435	–	–	–	–	–	–	–	–	824
1998/99	394	417	–	–	–	–	–	–	–	–	811
1999/00	374	381	–	–	–	–	–	–	–	–	755
2000/01	352	383	–	–	–	–	–	–	–	–	735
2001/02	339	381	–	–	–	–	–	–	–	–	720
2002/03	341	395	–	–	–	–	–	–	–	–	736
2003/04	334	400	–	–	–	–	–	–	–	–	734
2004/05	338	390	–	–	–	–	–	–	–	–	728
2005/06	350	364	–	–	–	–	–	–	–	–	714
2006/07	355	347	–	–	–	–	–	–	–	–	702
2007/08	341	332	–	–	–	–	–	–	–	–	673
2008/09	340	333	–	–	–	–	–	–	–	–	673
2009/10	337	361	–	–	–	–	–	–	–	–	698
2010/11	349	374	–	–	–	–	–	–	–	–	723
2011/12	351	380	–	–	–	–	–	–	–	–	731
2012/13	352	405	–	–	–	–	–	–	–	–	757
2013/14	366	396	–	–	–	–	–	–	–	–	762
2014/15	391	401	–	–	–	–	–	–	–	–	792
2015/16	402	413	–	–	–	–	–	–	–	–	815
2016/17	406	421	–	–	–	–	–	–	–	–	827
2017/18	403	414	–	–	–	–	–	–	–	–	817
2018/19	389	417	–	–	–	–	–	–	–	–	806
2019/20	379	409	–	–	–	–	–	–	–	–	788
2020/21	371	405	189	188	205	194	–	–	–	–	776
2021/22	365	401	189	187	189	201	–	–	–	–	766
2022/23	381	388	205	189	185	190	–	–	–	–	769
2023/24	365	391	181	204	189	182	–	–	–	–	756
2024/25	367	371	170	175	200	187	–	–	–	–	738
2025/26	348	373	179	164	179	199	–	–	–	–	721