Home · By area · Release notes. Enrolment by planning area, local authority, school patron, county.

IOMAIR N S

Roll number: 08512U Killimor, Ballinasloe, Co. Galway

School details

Address: Killimor, Ballinasloe, Co. Galway (H53DP95)
Email: [email protected]
Phone: 0909676428
Principal: Aisling Mary Thornton
Ethos: Catholic
DEIS: N
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: Galway County Council
School patron: Bishop of Clonfert
School type: Ordinary
School level: All-Through School
Planning area: Portumna

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

26.00

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	107	4	26.75	34	1
2007/08	114	5	22.80	31	1
2008/09	108	5	21.60	28	0
2009/10	111	5	22.20	28	0
2010/11	102	5	20.40	26	0
2011/12	109	4	27.25	35	1
2012/13	108	4	27.00	32	1
2013/14	107	4	26.75	35	1
2014/15	100	4	25.00	32	1
2015/16	102	4	25.50	30	1
2016/17	109	4	27.25	33	2
2017/18	106	4	26.50	34	1
2019/20	113	5	22.60	28	0
2020/21	111	6	18.50	28	0
2021/22	114	5	22.80	33	1
2022/23	123	5	24.60	32	1
2023/24	124	5	24.80	34	2
2024/25	126	5	25.20	32	1
2025/26	130	5	26.00	34	2

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 2006/07: 104 in 2005/06 → 116, +12 pupils.
Biggest loss in a single year: 1995/96: 168 in 1994/95 → 140, -28 pupils.
Largest single-class increase: Senior Infants in 2025/26 (13 → 24, +11).
Largest single-class decrease: Senior Infants in 2024/25 (19 → 13, -6).
Largest cohort-step gain: SI → 1st in 2025/26 (13 → 16, +3).
Largest cohort-step loss: SI → 1st in 2021/22 (15 → 13, -2).
Overall: 206 (1975/76) → 136 (2025/26), -70.

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	13	22	17.3	6
Senior Infants	13	24	17.0	6
1st Class	12	19	15.2	6
2nd Class	11	21	15.5	6
3rd Class	12	19	15.2	6
4th Class	12	18	14.5	6
5th Class	10	19	14.3	6
6th Class	9	19	13.3	6
Total	100	206	135.0	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 13

SI 2021/22 13

-1

1st 2022/23 12

-1

2nd 2023/24 11

3rd 2024/25 12

4th 2025/26 12

Cohort 2021/22

JI 2021/22 19

-1

SI 2022/23 18

1st 2023/24 19

2nd 2024/25 19

3rd 2025/26 19

Cohort 2022/23

JI 2022/23 19

SI 2023/24 19

1st 2024/25 19

2nd 2025/26 21

Cohort 2023/24

JI 2023/24 14

-1

SI 2024/25 13

1st 2025/26 16

Cohort 2024/25

JI 2024/25 22

SI 2025/26 24

Cohort 2025/26

JI 2025/26 17

Raw data by year

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
1975/76	–	–	–	–	–	–	–	–	–	–	206
1976/77	94	108	–	–	–	–	–	–	–	–	202
1977/78	87	103	–	–	–	–	–	–	–	–	190
1978/79	–	–	–	–	–	–	–	–	–	–	186
1979/80	103	87	–	–	–	–	–	–	–	–	190
1980/81	100	80	–	–	–	–	–	–	–	–	180
1981/82	94	85	–	–	–	–	–	–	–	–	179
1982/83	85	79	–	–	–	–	–	–	–	–	164
1983/84	82	84	–	–	–	–	–	–	–	–	166
1993/94	86	88	–	–	–	–	–	–	–	–	174
1994/95	76	92	–	–	–	–	–	–	–	–	168
1995/96	62	78	–	–	–	–	–	–	–	–	140
1996/97	60	71	–	–	–	–	–	–	–	–	131
1997/98	65	66	–	–	–	–	–	–	–	–	131
1998/99	64	65	–	–	–	–	–	–	–	–	129
1999/00	64	69	–	–	–	–	–	–	–	–	133
2000/01	65	65	–	–	–	–	–	–	–	–	130
2001/02	58	67	–	–	–	–	–	–	–	–	125
2002/03	63	60	–	–	–	–	–	–	–	–	123
2003/04	59	58	–	–	–	–	–	–	–	–	117
2004/05	54	62	–	–	–	–	–	–	–	–	116
2005/06	44	60	–	–	–	–	–	–	–	–	104
2006/07	51	65	–	–	–	–	–	–	–	–	116
2007/08	55	66	–	–	–	–	–	–	–	–	121
2008/09	52	65	–	–	–	–	–	–	–	–	117
2009/10	55	63	–	–	–	–	–	–	–	–	118
2010/11	50	57	–	–	–	–	–	–	–	–	107
2011/12	52	57	–	–	–	–	–	–	–	–	109
2012/13	55	53	–	–	–	–	–	–	–	–	108
2013/14	53	54	–	–	–	–	–	–	–	–	107
2014/15	49	51	–	–	–	–	–	–	–	–	100
2015/16	52	50	–	–	–	–	–	–	–	–	102
2016/17	55	54	–	–	–	–	–	–	–	–	109
2017/18	54	52	–	–	–	–	–	–	–	–	106
2018/19	54	61	–	–	–	–	–	–	–	–	115
2019/20	48	65	–	–	–	–	–	–	–	–	113
2020/21	53	58	13	15	12	15	18	15	10	13	111
2021/22	52	62	19	13	13	13	15	18	14	9	114
2022/23	62	61	19	18	12	14	13	15	19	13	123
2023/24	58	66	14	19	19	11	14	13	15	19	124
2024/25	61	69	22	13	19	19	12	14	13	14	130
2025/26	65	71	17	24	16	21	19	12	15	12	136