Age of youngest dependent child by household type


This dataset provides Census 2021 estimates that classify households in England and Wales by age of youngest dependent child and by household type. The estimates are as at Census Day, 21 March 2021.

Variable and dataset information

Area type

Census 2021 statistics are published for a number of different geographies. These can be large, for example the whole of England, or small, for example an output area (OA), the lowest level of geography for which statistics are produced.

For higher levels of geography, more detailed statistics can be produced. When a lower level of geography is used, such as output areas (which have a minimum of 100 persons), the statistics produced have less detail. This is to protect the confidentiality of people and ensure that individuals or their characteristics cannot be identified.

Lower tier local authorities

Lower tier local authorities provide a range of local services. There are 309 lower tier local authorities in England made up of 181 non-metropolitan districts, 59 unitary authorities, 36 metropolitan districts and 33 London boroughs (including City of London). In Wales there are 22 local authorities made up of 22 unitary authorities.


Census 2021 statistics are published for the whole of England and Wales. However, you can choose to filter areas by:

  • country - for example, Wales
  • region - for example, London
  • local authority - for example, Cornwall
  • health area – for example, Clinical Commissioning Group
  • statistical area - for example, MSOA or LSOA

Dependent children in household and their age (B)

Classifies the number of dependent children in a household, by the age of the youngest child.

Household type

Classifies households in an alternative way to the "household composition" classification used in most standard census results.

The type of family present classifies a household. However, households with more than one family are categorised using this priority order:

* married couple family

* civil partnership couple family

* cohabiting couple family

* lone parent family

Within a family type, a family with dependent children takes priority.

The alternative definitions used in tables that use this classification are:

* married couple household

* same-sex civil partnership couple household

* cohabiting couple household

* lone parent household


Population type
All households
Area type
Lower tier local authorities
England and Wales
Dependent children in household and their age (B)
6 Categories
  • No dependent children in household
  • Youngest dependent child: Aged 0 to 4 years
  • Youngest dependent child: Aged 5 to 9 years
  • Youngest dependent child: Aged 10 to 15 years
  • Youngest dependent child: Aged 16 to 18 years
  • Does not apply
Household type
6 Categories
  • One-person household
  • Married or civil partnership couple household
  • Cohabiting couple household
  • Lone parent household
  • Multi-person household
  • Does not apply

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Protecting personal data

Sometimes we need to make changes to data if it is possible to identify individuals. This is known as statistical disclosure control.

In Census 2021, we:

  • swapped records (targeted record swapping), for example, if a household was likely to be identified in datasets because it has unusual characteristics, we swapped the record with a similar one from a nearby small area (very unusual households could be swapped with one in a nearby local authority)
  • added small changes to some counts (cell key perturbation), for example, we might change a count of four to a three or a five – this might make small differences between tables depending on how the data are broken down when we applied perturbation

Read more in Section 5 of our article Design for Census 2021.

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