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

THE HAROLD SCHOOL

Roll number: 20141G Eden Road, Glasthule, Co. Dublin

School details

Address: Eden Road, Glasthule, Co. Dublin (A96X043)
Email: [email protected]
Phone: 012805708
Principal: Dervla Nic Mhathúna
Ethos: Catholic
DEIS: N
Irish classification: No subjects through Irish
Gaeltacht: N
Island: N
Local authority: Dun Laoghaire Rathdown
School patron: Archbishop of Dublin
School type: Ordinary
School level: All-Through School
Planning area: Dunlaoghaire

Preliminary data

The latest year shown (2025/26) is preliminary and subject to revision when the official enrolment figures are released by the Department of Education.

Data highlights

Key numbers to spot outliers or notable changes.

Biggest gain in a single year: 2010/11: 547 in 2009/10 → 585, +38 pupils.
Biggest loss in a single year: 2020/21: 677 in 2019/20 → 658, -19 pupils.
Largest single-class increase: 2nd Class in 2021/22 (81 → 90, +9).
Largest single-class decrease: 3rd Class in 2024/25 (84 → 75, -9).
Largest cohort-step gain: 4th → 5th in 2021/22 (80 → 85, +5).
Largest cohort-step loss: 5th → 6th in 2022/23 (85 → 74, -11).
Overall: 463 (2001/02) → 642 (2025/26 (preliminary)), 179.

Summary statistics (class-level data)

Min / max / mean enrolment per class across the available years (2020/21–2024/25; preliminary year excluded from class stats).

Class	Min	Max	Mean	Years
Junior Infants	82	86	84.4	5
Senior Infants	81	89	84.0	5
1st Class	85	91	88.0	5
2nd Class	81	90	85.8	5
3rd Class	75	88	81.2	5
4th Class	77	84	81.4	5
5th Class	75	85	80.0	5
6th Class	70	75	72.6	5
Total	463	680	593.6	25

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 86

-2

SI 2021/22 84

1st 2022/23 88

-4

2nd 2023/24 84

-9

3rd 2024/25 75

Cohort 2021/22

JI 2021/22 82

SI 2022/23 82

1st 2023/24 85

2nd 2024/25 85

Cohort 2022/23

JI 2022/23 83

SI 2023/24 84

1st 2024/25 86

Cohort 2023/24

JI 2023/24 85

-4

SI 2024/25 81

Cohort 2024/25

JI 2024/25 86

Raw data by year

Years marked (preliminary) are subject to revision when official data are published.

Year	Female	Male	JI	SI	1st	2nd	3rd	4th	5th	6th	Total
2001/02	235	228	–	–	–	–	–	–	–	–	463
2002/03	248	227	–	–	–	–	–	–	–	–	475
2003/04	238	234	–	–	–	–	–	–	–	–	472
2004/05	234	253	–	–	–	–	–	–	–	–	487
2005/06	231	260	–	–	–	–	–	–	–	–	491
2006/07	235	261	–	–	–	–	–	–	–	–	496
2007/08	234	262	–	–	–	–	–	–	–	–	496
2008/09	241	274	–	–	–	–	–	–	–	–	515
2009/10	264	283	–	–	–	–	–	–	–	–	547
2010/11	291	294	–	–	–	–	–	–	–	–	585
2011/12	305	306	–	–	–	–	–	–	–	–	611
2012/13	315	300	–	–	–	–	–	–	–	–	615
2013/14	319	311	–	–	–	–	–	–	–	–	630
2014/15	325	338	–	–	–	–	–	–	–	–	663
2015/16	337	343	–	–	–	–	–	–	–	–	680
2016/17	335	335	–	–	–	–	–	–	–	–	670
2017/18	336	331	–	–	–	–	–	–	–	–	667
2018/19	354	317	–	–	–	–	–	–	–	–	671
2019/20	351	326	–	–	–	–	–	–	–	–	677
2020/21	339	319	86	89	91	81	80	80	76	75	658
2021/22	341	323	82	84	90	90	79	83	85	71	664
2022/23	341	321	83	82	88	89	88	77	81	74	662
2023/24	344	310	85	84	85	84	84	84	75	73	654
2024/25	341	308	86	81	86	85	75	83	83	70	649
2025/26 (preliminary)	325	317	–	–	–	–	–	–	–	–	642