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Welsh Government
Data Provider: Welsh Government National Statistics Components of population change, by local authority and component
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PeriodTime period running from 30 June in the first year to 30 June in the following year.[Filtered]
Area Code[Filter]
Measure1
[Collapse]ComponentComponent of population change during the period, together with the start and end of period populations.[Filter]
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[Collapse]Component 1
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[Collapse]Component 2
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Component 3
[Collapse]Local authorityLocal authorities in Wales.[Filter]
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Local authority 1
[Collapse]Population at end of periodThis is calculated by adding natural change, net migration and other unattributable change during the period to the population at the start of the period. It equates to the Registrar General\'s estimates of resident population at 30 June at the end of the period.Click here to sortPopulation at end of periodThis is calculated by adding natural change, net migration and other unattributable change during the period to the population at the start of the period. It equates to the Registrar General\'s estimates of resident population at 30 June at the end of the period.
[Expand]Click here to sortPopulation at start of periodRegistrar General\'s estimates of resident population at 30 June at the start of the period[Collapse]Natural change during periodThis is calculated as births during the period less deaths during the period.Click here to sortNatural change during periodThis is calculated as births during the period less deaths during the period.[Collapse]Net migration and other changes during periodInward migration (inflow) less outward migration (outflow) from/to outside the area; includes changes to the size of armed forces and prison populations and other, small, adjustmentsClick here to sortNet migration and other changes during periodInward migration (inflow) less outward migration (outflow) from/to outside the area; includes changes to the size of armed forces and prison populations and other, small, adjustments
[Expand]Click here to sortBirths during periodNumber of live births during period[Expand]Click here to sortDeaths during periodNumber of deaths during period, not including still births[Collapse]Net internal migration during periodInward internal migration (inflow) less outward internal migration (outflow) from/to outside the areaClick here to sortNet internal migration during periodInward internal migration (inflow) less outward internal migration (outflow) from/to outside the area[Collapse]Net international migration during periodInward international migration (inflow) less outward international migration (outflow) from/to outside the areaClick here to sortNet international migration during periodInward international migration (inflow) less outward international migration (outflow) from/to outside the area[Expand]Click here to sortOther changes, including unattributable changes, during periodThese include changes to the size of armed forces and prison populations and other, small, adjustments. Unattributable elements relate to any potential inaccuracy around components arising in the period between Censuses. For more information please see the document http://www.ons.gov.uk/ons/rel/pop-estimate/population-estimates-for-england-and-wales/mid-2002-to-mid-2010-revised--subnational-/index.html.
Click here to sortInward internal migration (Inflow)Click here to sortOutward internal migration (Outflow)Click here to sortInward international migration (Inflow)Click here to sortOutward international migration(Outflow)
[Collapse]Wales24,686,746247,947275,472-27,525609,213541,75167,462158,230100,23357,997-40,08285,37724,744,598
WalesIsle of Anglesey551,1675,0986,790-1,69221,37319,6921,6815265242-703980550,455
Gwynedd948,2328,76611,081-2,31551,32850,8354939,9875,9564,031-4,414110946,027
Conwy919,3488,08712,664-4,57741,77036,5645,2062,2942,600-306-1,7333,167917,938
Denbighshire759,6487,72810,153-2,42538,94734,7894,1581,7121,093619-4644,313761,536
Flintshire1,235,10812,13112,603-47245,14042,1542,9864,8933,969924-1,5582,3521,236,988
Wrexham1,085,79611,41611,770-35434,47737,146-2,6695,9113,9501,961473-2351,085,207
Powys1,059,9888,71713,198-4,48149,78944,2255,5642,9292,90326-275,5631,061,070
Ceredigion578,0684,4296,580-2,15146,62048,034-1,4144,8193,4171,402-1,424-1,436574,481
Pembrokeshire975,5208,63912,039-3,40037,52330,6156,9082,9242,83094-1,3835,619977,739
Carmarthenshire1,485,85413,88918,680-4,79159,71448,78510,9294,2603,644616-1,9869,5591,490,622
Swansea1,911,92818,38821,480-3,09294,43995,355-91621,16912,6338,536-2,4745,1461,913,982
Neath Port Talbot1,128,13411,08813,689-2,60148,18141,8696,3122,9341,991943-1,9355,3201,130,853
Bridgend1,149,00711,51213,200-1,68840,10533,5656,5402,2252,17451-1006,4911,153,810
Vale of Glamorgan1,031,11610,24210,734-49249,45839,9419,5172,8943,012-118-2,1297,2701,037,894
Cardiff2,842,25232,57123,3159,256198,569204,312-5,74362,95532,49930,456-12,82911,8842,863,392
Rhondda Cynon Taf1,892,28420,20521,147-94263,21661,4411,7759,4905,5903,900-9994,6761,896,018
Merthyr Tydfil473,0325,4135,3635013,66113,2554061,364929435-867-26473,056
Caerphilly1,419,22114,81915,329-51041,89840,8971,0011,6121,338274-3,148-1,8731,416,838
Blaenau Gwent542,2525,7216,859-1,13816,65015,5511,099825591234-1,918-585540,529
Torfaen730,6847,7658,349-58425,20621,2213,985657488169-1,5762,578732,678
Monmouthshire736,7295,8588,234-2,37642,07435,9196,1552,0992,137-38-1,7194,398738,751
Newport1,231,37815,46512,2153,25052,98449,4953,4899,7515,9653,7862,83110,1061,244,734

Metadata

Title

Components of population change (1991 onwards), by Welsh local authorities

Last update

November 2023 November 2023

Next update

Summer 2023

Publishing organisation

Welsh Government

Source 1

Mid-year population estimates, Office for National Statistics

Contact email

stats.popcensus@gov.wales

Designation

National Statistics

Lowest level of geographical disaggregation

Local authorities

Geographical coverage

Wales

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 http://www.nationalarchives.gov.uk/doc/open-government-licence

Statistical quality

See weblinks

General description

This dataset provides the components of change within the official population estimates for the local authorities in Wales. These estimates are consistent with the results of Census 2011 and show the contributions that natural change (births less deaths); different elements of migration and other smaller adjustments make to the changing population estimates in each local authority over the period since 1991.

The mid-2020 population estimates are the first population estimates to show some of the impacts of the coronavirus (COVID-19) pandemic. However, these estimates refer to the population as at 30 June 2020, meaning that they only account for the first three months of the pandemic.

Future releases of the population estimates provide information on the impact from mid-2020 onwards.

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

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

Annual

Data reference periods

Data are produced and reported annually and relate to the change between 30 June of successive years 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.

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).

This data set consists of inflow and outflow for internal and international migration from 2012-13 onwards. This additional data replaces the international migration flow data set (POPU5022), because the ONS judged that the data is a more accurate source of long-term migration at a regional level.

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

Revisions were made in July 2019 to two components of change, ‘Net international migration during the period’ and ‘Other changes including unattributable changes during period’, for the period 2001-02 to 2010-11. This was due to historical data not having been updated as a result of revisions following the publication of data from Census 2011.

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.

Keywords

Population; births; deaths; natural change; international migration; internal migration; components of change