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Data Provider: Welsh Government National Statistics Components of population change, by local authority and component
Area Code[Filter]
[Collapse]Component 1
[Collapse]Component 2
Component 3
[Collapse]Local authority[Filter]
Local authority 1
[Collapse]Population at end of periodClick here to sortPopulation at end of period
[Expand]Click here to sortPopulation at start of period[Collapse]Natural change during periodClick here to sortNatural change during period[Collapse]Net migration and other changes during periodClick here to sortNet migration and other changes during period
[Expand]Click here to sortBirths during period[Expand]Click here to sortDeaths during period[Collapse]Net internal migration during periodClick here to sortNet internal migration during period[Collapse]Net international migration during periodClick here to sortNet international migration during period[Expand]Click here to sortOther changes, including unattributable changes, during period
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)
WalesIsle of Anglesey209,7422,0902,435-3456,9487,062-114365182183-71-2209,395
Neath Port Talbot423,0774,4904,947-45714,18412,5951,589800338462432,094424,714
Vale of Glamorgan384,8804,0193,87914015,71213,5552,157887580307772,541387,561
Rhondda Cynon Taf712,4288,0957,60549020,95320,6942592,5131,0071,50611,766714,684
Merthyr Tydfil178,0172,2031,8773264,7514,52322855524131429571178,914
Blaenau Gwent208,8302,1822,421-2395,5385,514243571871701195208,786


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

Last update
June 2018 June 2018

Next update
June 2019

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

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 the 2011 Census 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.

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 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 the 2011 Census (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 England and Wales were revised on the 22 March 2018, following methodological improvements (see weblinks).

Statistical quality
See weblinks

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