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SCOIL NAOMH FIACHRA

Roll number: 12077E Illistrin, Letterkenny, Co. Donegal

School details

Address: Illistrin, Letterkenny, Co. Donegal (F92WD21)
Email: [email protected]
Phone: 0749125775
Principal: Luke Kilcoyne
Ethos: Catholic
DEIS: N
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: Donegal County Council
School patron: Bishop of Raphoe
School type: Ordinary
School level: All-Through School
Planning area: Letterkenny

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

25.95

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	343	12	28.58	35	4
2007/08	365	13	28.08	34	5
2008/09	404	15	26.93	34	3
2009/10	430	16	26.88	34	3
2010/11	448	16	28.00	32	6
2011/12	437	16	27.31	32	3
2012/13	465	17	27.35	32	3
2013/14	477	18	26.50	33	5
2014/15	495	19	26.05	31	4
2015/16	515	19	27.11	33	5
2016/17	541	20	27.05	32	5
2017/18	557	20	27.85	32	7
2019/20	552	22	25.09	32	3
2020/21	517	21	24.62	32	3
2021/22	515	20	25.75	32	3
2022/23	494	21	23.52	29	0
2023/24	507	20	25.35	32	4
2024/25	514	20	25.70	32	6
2025/26	519	20	25.95	32	6

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 2003/04: 219 in 2002/03 → 265, +46 pupils.
Biggest loss in a single year: 2020/21: 552 in 2019/20 → 517, -35 pupils.
Largest single-class increase: 6th Class in 2025/26 (77 → 100, +23).
Largest single-class decrease: 5th Class in 2025/26 (92 → 64, -28).
Largest cohort-step gain: JI → SI in 2025/26 (50 → 64, +14).
Largest cohort-step loss: SI → 1st in 2021/22 (58 → 54, -4).
Overall: 86 (1974/75) → 519 (2025/26), 433.

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	40	50	46.5	6
Senior Infants	43	64	51.8	6
1st Class	44	63	55.0	6
2nd Class	52	72	60.2	6
3rd Class	60	81	67.8	6
4th Class	63	86	71.8	6
5th Class	64	92	77.7	6
6th Class	60	100	80.2	6
Total	85	570	308.9	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 44

-1

SI 2021/22 43

1st 2022/23 44

2nd 2023/24 52

3rd 2024/25 60

4th 2025/26 63

Cohort 2021/22

JI 2021/22 40

SI 2022/23 46

1st 2023/24 55

2nd 2024/25 61

3rd 2025/26 63

Cohort 2022/23

JI 2022/23 47

-1

SI 2023/24 46

+10

1st 2024/25 56

2nd 2025/26 57

Cohort 2023/24

JI 2023/24 48

SI 2024/25 54

1st 2025/26 58

Cohort 2024/25

JI 2024/25 50

+14

SI 2025/26 64

Cohort 2025/26

JI 2025/26 50

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	38	48	–	–	–	–	–	–	–	–	86
1975/76	–	–	–	–	–	–	–	–	–	–	85
1976/77	42	52	–	–	–	–	–	–	–	–	94
1977/78	–	–	–	–	–	–	–	–	–	–	99
1978/79	49	54	–	–	–	–	–	–	–	–	103
1979/80	51	58	–	–	–	–	–	–	–	–	109
1980/81	50	61	–	–	–	–	–	–	–	–	111
1981/82	45	61	–	–	–	–	–	–	–	–	106
1982/83	42	66	–	–	–	–	–	–	–	–	108
1993/94	38	60	–	–	–	–	–	–	–	–	98
1994/95	39	72	–	–	–	–	–	–	–	–	111
1995/96	42	78	–	–	–	–	–	–	–	–	120
1996/97	44	84	–	–	–	–	–	–	–	–	128
1997/98	48	93	–	–	–	–	–	–	–	–	141
1998/99	58	101	–	–	–	–	–	–	–	–	159
1999/00	61	114	–	–	–	–	–	–	–	–	175
2000/01	68	116	–	–	–	–	–	–	–	–	184
2001/02	72	140	–	–	–	–	–	–	–	–	212
2002/03	79	140	–	–	–	–	–	–	–	–	219
2003/04	97	168	–	–	–	–	–	–	–	–	265
2004/05	105	185	–	–	–	–	–	–	–	–	290
2005/06	127	179	–	–	–	–	–	–	–	–	306
2006/07	155	188	–	–	–	–	–	–	–	–	343
2007/08	176	189	–	–	–	–	–	–	–	–	365
2008/09	203	201	–	–	–	–	–	–	–	–	404
2009/10	213	217	–	–	–	–	–	–	–	–	430
2010/11	225	223	–	–	–	–	–	–	–	–	448
2011/12	216	221	–	–	–	–	–	–	–	–	437
2012/13	229	236	–	–	–	–	–	–	–	–	465
2013/14	224	253	–	–	–	–	–	–	–	–	477
2014/15	244	251	–	–	–	–	–	–	–	–	495
2015/16	244	271	–	–	–	–	–	–	–	–	515
2016/17	250	291	–	–	–	–	–	–	–	–	541
2017/18	256	301	–	–	–	–	–	–	–	–	557
2018/19	256	314	–	–	–	–	–	–	–	–	570
2019/20	253	299	–	–	–	–	–	–	–	–	552
2020/21	232	285	44	58	63	63	81	75	73	60	517
2021/22	225	290	40	43	54	72	64	86	78	78	515
2022/23	210	284	47	46	44	56	76	63	85	77	494
2023/24	221	286	48	46	55	52	63	80	74	89	507
2024/25	237	277	50	54	56	61	60	64	92	77	514
2025/26	234	285	50	64	58	57	63	63	64	100	519