Population aged 0 to 15 in Merthyr Tydfil

Population aged 0 to 15 in Merthyr Tydfil was 18.5% in 2025, according to the Office for National Statistics (United Kingdom). That is down 0.3 pts from 2024.

202518.5%

Change on 2024-0.3 pts

Series high19.12018

Series low18.52025

Next release: Thursday, 29 July 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Population aged 0 to 15 in Merthyr Tydfil, 2011 to 2025

%. Source: Office for National Statistics, Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1). Retrieved 2026-10-12, published 2026-07-29.

All 15 values

Period	%
2025	18.5
2024	18.8
2023	18.9
2022	19
2021	18.9
2020	19
2019	19
2018	19.1
2017	18.9
2016	18.7
2015	18.6
2014	18.6
2013	18.7
2012	18.7
2011	18.6

Compared with Wales

Place	2025
Merthyr Tydfil	18.5
Wales	16.8

Definition

Residents aged 0 to 15 as a percentage of total population, from the Office for National Statistics mid-year estimates for 30 June. United Kingdom regions and local authorities.

The ONS groups children as aged 0 to 15, the ages before the working age group of 16 to 64, so this share includes one more year of age than population_0_14_share (Eurostat and World Bank) and is a little higher. Published rounded to one decimal.

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How to cite

Office for National Statistics. Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1). Contains public sector information licensed under the Open Government Licence v3.0. https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=201&measures=20301&time=2011,latest. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

Office for National Statistics (United Kingdom). (2026). Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1) (Population aged 0 to 15, Merthyr Tydfil, 2011 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=201&measures=20301&time=2011,latest

MLA 9

Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1), Population aged 0 to 15, Merthyr Tydfil, 2011 to 2025. Office for National Statistics (United Kingdom), 29 July 2026, https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=201&measures=20301&time=2011,latest. Invokely, https://invokely.ai/en/population-0-15/merthyr-tydfil-uk. Accessed 12 Oct. 2026.

Chicago (author-date)

Office for National Statistics (United Kingdom). 2026. Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1). Population aged 0 to 15, Merthyr Tydfil, 2011 to 2025. Dataset. Accessed October 12, 2026. https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=201&measures=20301&time=2011,latest. Also distributed by Invokely, https://invokely.ai/en/population-0-15/merthyr-tydfil-uk.

Harvard

Office for National Statistics (United Kingdom) (2026) Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1), Population aged 0 to 15, Merthyr Tydfil, 2011 to 2025 [Dataset]. Available at: https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=201&measures=20301&time=2011,latest, via Invokely: https://invokely.ai/en/population-0-15/merthyr-tydfil-uk (Accessed: 12 October 2026).

BibTeX

@misc{office_population_aged_0_to_2025,
  author = {{Office for National Statistics (United Kingdom)}},
  title = {{Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM\_2002\_1): Population aged 0 to 15, Merthyr Tydfil, 2011 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=201&measures=20301&time=2011,latest},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/population-0-15/merthyr-tydfil-uk. Publisher attribution: Office for National Statistics. Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM\_2002\_1). Contains public sector information licensed under the Open Government Licence v3.0. https://www.nomisweb.co.uk/api/v01/dataset/NM\_2002\_1.data.json?geography=TYPE480,TYPE424\&gender=0\&c\_age=201\&measures=20301\&time=2011,latest. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - Office for National Statistics (United Kingdom)
TI  - Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1): Population aged 0 to 15, Merthyr Tydfil, 2011 to 2025
PY  - 2026
DA  - 2026/07/29
PB  - Office for National Statistics (United Kingdom)
DB  - Invokely
UR  - https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=201&measures=20301&time=2011,latest
L2  - https://invokely.ai/en/population-0-15/merthyr-tydfil-uk
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/population-0-15/merthyr-tydfil-uk.
N1  - Publisher attribution: Office for National Statistics. Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1). Contains public sector information licensed under the Open Government Licence v3.0. https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=201&measures=20301&time=2011,latest. Retrieved 2026-10-12.
ER  -

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Questions

What is the population aged 0 to 15 in Merthyr Tydfil?

Population aged 0 to 15 in Merthyr Tydfil was 18.5% in 2025, according to the Office for National Statistics (United Kingdom). That is down 0.3 pts from 2024.

Where does this figure come from?

Office for National Statistics (United Kingdom). Population estimates, local authority based by single year of age: aged 0 to 15, both sexes, percent of all ages, mid-year (ONS, Nomis NM_2002_1). Retrieved by Invokely on 2026-10-12.

What was the highest population aged 0 to 15 in Merthyr Tydfil?

19.1% in 2018, the highest value since 2011 in this series.

Population aged 0 to 15 elsewhere in Wales

Related statistics for Merthyr Tydfil

All statistics for Merthyr Tydfil | Merthyr Tydfil in figures