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About this dataset

This dataset provides Census 2021 estimates that classify usual residents in Wales aged 3 years and over in Wales by Welsh language skills and country of birth. The estimates are as at Census Day, 21 March 2021.

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.

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About the variables

Country of birth (15 categories)

Description: The country in which a person was born. For people not born in one of in the four parts of the UK, there was an option to select "elsewhere". People who selected "elsewhere" were asked to write in the current name for their country of birth.

Comparability with 2011: Broadly comparable. We have changed some categories to make them more consistent with country classifications used in other national statistics.


Welsh language skills (8 categories)

Description: Whether a person has Welsh language skills. If they do, can they do any of the following: * understand spoken Welsh * speak Welsh * read Welsh * write Welsh * no skills in Welsh

The census questionnaire only asked this question to people in Wales. In results that classify people by Welsh language skills, a person may appear in more than one category depending on which combination of skills they have.

Comparability with 2011: Highly comparable


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