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Data Provider: Welsh Government National Statistics Population estimates by local authority, region and sex
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Age 3[Filter]
YearEstimates relate to 30 June of each year.[Filtered]
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Sex 1
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Area 2
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Wales[Collapse]North Wales1,010,3441,053,0652,063,409
North WalesIsle of Anglesey101,123105,657206,780
[Collapse]Mid and South West Wales1,322,0941,371,0472,693,141
Mid and South West WalesPowys197,390202,221399,611
Neath Port Talbot209,089217,311426,400
[Collapse]South East Wales2,243,6352,341,5714,585,206
South East WalesBridgend216,046221,262437,308
Vale of Glamorgan191,488205,719397,207
Rhondda Cynon Taf350,065364,537714,602
Merthyr Tydfil86,53090,416176,946
Blaenau Gwent98,891102,331201,222



Mid-year population estimates (1991 onwards), by Welsh local authorities, single year of age and sex

Last update

November 2023 November 2023

Next update

Summer 2024 (provisional)

Publishing organisation

Welsh Government

Source 1

Mid-year population estimates, Office for National Statistics

Contact email


National Statistics

Lowest level of geographical disaggregation

Local authorities

Geographical coverage


Languages covered

English and Welsh

Data licensing

You may use and re-use this data free of charge in any format or medium, under the terms of the Open Government License - see


Population; Welsh population; Mid-year population estimates;

General description

This dataset provides population estimates for the local authorities in Wales, for the period from 1991 onwards by sex and single year of age, together with some aggregated age groups.

It should be noted that for mid-2020 there are some definitional changes (particularly affecting the migration components) compared with mid-2019 population estimates data, and it is advised users read the Quality and Methodology Information section on the Office for National Statistics website.

For Wales, the mid-2021 population estimates are the first population estimates to be based on Census 2021.

This material is Crown Copyright and may be re-used (not including logos) free of charge in any format or medium, under the terms of the Open Government Licence.

Data collection and calculation

See weblinks

Frequency of publication


Data reference periods

Data are produced and reported annually and relate to the 30 June of each year from 1991 onwards.

Users, uses and context

The data presented here are used by central government departments and local authorities for a range of purposes including planning and monitoring of services, and as denominators for the calculation of various rates and indicators.

Rounding applied

Data are provided on an unrounded basis although the Office for National Statistics advises that any results presented from these data are rounded to the nearest 100 where practical.

Revisions information

The data presented here reflect changes made to population estimates from 2001 to 2010 in re-basing the data to be consistent with the results of Census 2011 (see weblinks).

Mid-2012 to mid-2016 subnational population estimates for Wales and England were revised on the 22 March 2018, following methodological improvements (see weblinks).

On 23 November 2023, the data set from 2012 to 2020 for Wales and England was rebased to be consistent with the results of Census 2021.

Statistical quality

See weblinks.