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S N NAOMH TREASA

Roll number: 19279F Clontumpher, Ballinalee, Co. Longford

School details

Address: Clontumpher, Ballinalee, Co. Longford (N39EW95)
Email: [email protected]
Phone: 0433323352
Principal: Kevin Mollaghan
Ethos: Catholic
DEIS: Y
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: Longford County Council
School patron: Bishop of Ardagh & Clonmacnoise
School type: Ordinary with Special Classes
School level: All-Through School
Planning area: Longford_Newtownforbes

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

21.69

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	232	9	25.78	32	3
2007/08	228	9	25.33	30	2
2008/09	237	9	26.33	31	4
2009/10	243	9	27.00	31	4
2010/11	253	9	28.11	33	5
2011/12	261	10	26.10	34	5
2012/13	262	10	26.20	32	3
2013/14	262	10	26.20	33	4
2014/15	257	10	25.70	32	3
2015/16	268	10	26.80	34	2
2016/17	283	11	25.73	36	4
2017/18	293	11	26.64	34	4
2019/20	285	12	23.75	28	0
2020/21	296	12	24.67	32	1
2021/22	289	13	22.23	27	0
2022/23	286	13	22.00	27	0
2023/24	287	13	22.08	29	0
2024/25	288	13	22.15	30	1
2025/26	282	13	21.69	32	3

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 2016/17: 286 in 2015/16 → 306, +20 pupils.
Biggest loss in a single year: 1976/77: 200 in 1975/76 → 186, -14 pupils.
Largest single-class increase: 4th Class in 2025/26 (32 → 44, +12).
Largest single-class decrease: Senior Infants in 2022/23 (41 → 27, -14).
Largest cohort-step gain: 3rd → 4th in 2025/26 (40 → 44, +4).
Largest cohort-step loss: JI → SI in 2022/23 (29 → 27, -2).
Overall: 199 (1974/75) → 306 (2025/26), 107.

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	29	41	36.3	6
Senior Infants	27	41	35.3	6
1st Class	29	42	35.0	6
2nd Class	31	40	34.8	6
3rd Class	29	42	35.8	6
4th Class	32	44	38.7	6
5th Class	33	43	37.3	6
6th Class	35	44	38.7	6
Total	186	319	243.8	43

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 41

SI 2021/22 41

-1

1st 2022/23 40

2nd 2023/24 40

3rd 2024/25 40

4th 2025/26 44

Cohort 2021/22

JI 2021/22 29

-2

SI 2022/23 27

1st 2023/24 29

2nd 2024/25 31

3rd 2025/26 31

Cohort 2022/23

JI 2022/23 34

-1

SI 2023/24 33

-1

1st 2024/25 32

2nd 2025/26 35

Cohort 2023/24

JI 2023/24 38

SI 2024/25 39

1st 2025/26 42

Cohort 2024/25

JI 2024/25 37

SI 2025/26 40

Cohort 2025/26

JI 2025/26 39

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	100	99	–	–	–	–	–	–	–	–	199
1975/76	–	–	–	–	–	–	–	–	–	–	200
1976/77	102	84	–	–	–	–	–	–	–	–	186
1977/78	102	90	–	–	–	–	–	–	–	–	192
1978/79	107	94	–	–	–	–	–	–	–	–	201
1979/80	106	97	–	–	–	–	–	–	–	–	203
1980/81	107	93	–	–	–	–	–	–	–	–	200
1981/82	105	102	–	–	–	–	–	–	–	–	207
1982/83	101	101	–	–	–	–	–	–	–	–	202
1983/84	98	107	–	–	–	–	–	–	–	–	205
1993/94	109	107	–	–	–	–	–	–	–	–	216
1994/95	100	106	–	–	–	–	–	–	–	–	206
1995/96	102	111	–	–	–	–	–	–	–	–	213
1996/97	105	103	–	–	–	–	–	–	–	–	208
1997/98	96	107	–	–	–	–	–	–	–	–	203
1998/99	94	107	–	–	–	–	–	–	–	–	201
1999/00	99	112	–	–	–	–	–	–	–	–	211
2000/01	103	107	–	–	–	–	–	–	–	–	210
2001/02	101	109	–	–	–	–	–	–	–	–	210
2002/03	107	109	–	–	–	–	–	–	–	–	216
2003/04	108	106	–	–	–	–	–	–	–	–	214
2004/05	101	121	–	–	–	–	–	–	–	–	222
2005/06	106	130	–	–	–	–	–	–	–	–	236
2006/07	107	129	–	–	–	–	–	–	–	–	236
2007/08	107	127	–	–	–	–	–	–	–	–	234
2008/09	108	136	–	–	–	–	–	–	–	–	244
2009/10	108	143	–	–	–	–	–	–	–	–	251
2010/11	112	152	–	–	–	–	–	–	–	–	264
2011/12	113	160	–	–	–	–	–	–	–	–	273
2012/13	120	154	–	–	–	–	–	–	–	–	274
2013/14	124	153	–	–	–	–	–	–	–	–	277
2014/15	124	151	–	–	–	–	–	–	–	–	275
2015/16	126	160	–	–	–	–	–	–	–	–	286
2016/17	135	171	–	–	–	–	–	–	–	–	306
2017/18	154	162	–	–	–	–	–	–	–	–	316
2018/19	153	158	–	–	–	–	–	–	–	–	311
2019/20	164	145	–	–	–	–	–	–	–	–	309
2020/21	164	155	41	32	36	37	42	38	33	37	319
2021/22	158	154	29	41	31	35	37	43	38	35	312
2022/23	156	154	34	27	40	31	36	37	43	38	310
2023/24	158	153	38	33	29	40	29	38	36	44	311
2024/25	153	156	37	39	32	31	40	32	41	36	309
2025/26	146	160	39	40	42	35	31	44	33	42	306