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S N NAOMH CHOLUMCHILLE

Roll number: 17508H DURROW, TULLAMORE, CO OFFALY

School details

Address: DURROW, TULLAMORE, CO OFFALY (R35XY40)
Email: [email protected]
Phone: 0579332433
Principal: Frank Kelly
Ethos: Catholic
DEIS: N
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: Offaly County Council
School patron: Bishop of Meath
School type: Ordinary
School level: All-Through School
Planning area: Tullamore_Killina

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

23.88

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	172	6	28.67	34	2
2007/08	187	8	23.38	30	1
2008/09	213	8	26.62	31	2
2009/10	210	8	26.25	31	1
2010/11	215	8	26.88	30	1
2011/12	215	8	26.88	31	1
2012/13	209	8	26.12	31	2
2013/14	211	8	26.38	31	1
2014/15	206	8	25.75	29	0
2015/16	210	8	26.25	31	1
2016/17	211	8	26.38	30	1
2017/18	209	8	26.12	30	2
2019/20	213	8	26.62	31	2
2020/21	213	8	26.62	30	1
2021/22	206	8	25.75	30	2
2022/23	205	8	25.62	30	1
2023/24	203	8	25.38	30	1
2024/25	194	8	24.25	30	1
2025/26	191	8	23.88	30	1

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 2008/09: 187 in 2007/08 → 213, +26 pupils.
Biggest loss in a single year: 2021/22: 213 in 2020/21 → 206, -7 pupils.
Largest single-class increase: Senior Infants in 2023/24 (20 → 29, +9).
Largest single-class decrease: 2nd Class in 2023/24 (29 → 21, -8).
Largest cohort-step gain: 1st → 2nd in 2024/25 (20 → 23, +3).
Largest cohort-step loss: JI → SI in 2021/22 (22 → 20, -2).
Overall: 88 (1974/75) → 197 (2025/26), 109.

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	19	28	22.7	6
Senior Infants	18	29	23.2	6
1st Class	20	29	25.2	6
2nd Class	21	30	25.8	6
3rd Class	21	30	25.5	6
4th Class	21	30	26.7	6
5th Class	25	30	27.7	6
6th Class	25	30	27.3	6
Total	88	215	159.6	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 22

-2

SI 2021/22 20

1st 2022/23 21

2nd 2023/24 21

3rd 2024/25 21

4th 2025/26 21

Cohort 2021/22

JI 2021/22 20

SI 2022/23 20

1st 2023/24 20

2nd 2024/25 23

3rd 2025/26 23

Cohort 2022/23

JI 2022/23 28

SI 2023/24 29

1st 2024/25 29

2nd 2025/26 29

Cohort 2023/24

JI 2023/24 24

SI 2024/25 25

1st 2025/26 25

Cohort 2024/25

JI 2024/25 19

-1

SI 2025/26 18

Cohort 2025/26

JI 2025/26 23

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1974/75	39	49	–	–	–	–	–	–	–	–	88
1975/76	–	–	–	–	–	–	–	–	–	–	92
1976/77	52	53	–	–	–	–	–	–	–	–	105
1977/78	48	57	–	–	–	–	–	–	–	–	105
1978/79	46	59	–	–	–	–	–	–	–	–	105
1979/80	49	56	–	–	–	–	–	–	–	–	105
1980/81	53	64	–	–	–	–	–	–	–	–	117
1981/82	53	65	–	–	–	–	–	–	–	–	118
1982/83	49	67	–	–	–	–	–	–	–	–	116
1983/84	52	69	–	–	–	–	–	–	–	–	121
1993/94	67	54	–	–	–	–	–	–	–	–	121
1994/95	64	56	–	–	–	–	–	–	–	–	120
1995/96	61	53	–	–	–	–	–	–	–	–	114
1996/97	59	58	–	–	–	–	–	–	–	–	117
1997/98	58	64	–	–	–	–	–	–	–	–	122
1998/99	56	66	–	–	–	–	–	–	–	–	122
1999/00	58	65	–	–	–	–	–	–	–	–	123
2000/01	50	67	–	–	–	–	–	–	–	–	117
2001/02	57	74	–	–	–	–	–	–	–	–	131
2002/03	67	73	–	–	–	–	–	–	–	–	140
2003/04	66	74	–	–	–	–	–	–	–	–	140
2004/05	78	74	–	–	–	–	–	–	–	–	152
2005/06	81	75	–	–	–	–	–	–	–	–	156
2006/07	85	87	–	–	–	–	–	–	–	–	172
2007/08	94	93	–	–	–	–	–	–	–	–	187
2008/09	113	100	–	–	–	–	–	–	–	–	213
2009/10	111	99	–	–	–	–	–	–	–	–	210
2010/11	108	107	–	–	–	–	–	–	–	–	215
2011/12	108	107	–	–	–	–	–	–	–	–	215
2012/13	101	108	–	–	–	–	–	–	–	–	209
2013/14	100	111	–	–	–	–	–	–	–	–	211
2014/15	97	109	–	–	–	–	–	–	–	–	206
2015/16	100	110	–	–	–	–	–	–	–	–	210
2016/17	102	109	–	–	–	–	–	–	–	–	211
2017/18	104	105	–	–	–	–	–	–	–	–	209
2018/19	107	102	–	–	–	–	–	–	–	–	209
2019/20	112	101	–	–	–	–	–	–	–	–	213
2020/21	118	95	22	27	29	23	26	30	29	27	213
2021/22	112	94	20	20	27	30	24	26	29	30	206
2022/23	110	95	28	20	21	29	30	25	25	27	205
2023/24	109	94	24	29	20	21	29	30	25	25	203
2024/25	108	92	19	25	29	23	21	28	30	25	200
2025/26	102	95	23	18	25	29	23	21	28	30	197