The United Kingdom (UK) comprises the countries of England, Wales, Scotland and Northern Ireland.
Great Britain comprises the countries of England, Wales and Scotland.Nôl i'r tabl cynnwys
For UK, England & Wales:
Office for National Statistics (ONS)
Census Customer Services
Tel: 01329 444972
Fax: 01633 652981
Minicom: 01329 444517
Postal address: Room 4300S, ONS, Segensworth Road, Titchfield, Hampshire, PO15 5RR
For Northern Ireland:
Northern Ireland Statistics and Research Agency (NISRA)
National Records of Scotland (NRS)Nôl i'r tabl cynnwys
The 31 July release of UK 2011 Census statistics provides unrounded population estimates by single year of age and sex and unrounded household estimates for the UK, its constituent countries and local authorities (or equivalent). Tables equivalent to those published on 17 December 2012 and 21 March 2013 are included in this release, but with unrounded and single year of age figures. In addition, a historic interactive UK population pyramid (1951 – 2011) has been produced and the interactive comparator tool has been updated.Nôl i'r tabl cynnwys
UK statistics are being released in stages, when comparable data are available for all constituent countries. The 31 July release provides unrounded single year of age data and covers the UK population and household figures of earlier releases:
17 December 2012: Population estimates by sex and five year age group (rounded to the nearest thousand).
21 March 2013: Population estimates by sex and five year age group (rounded to the nearest hundred) and household estimates (rounded to the nearest ten) for the UK.
Due to rounding in these earlier releases, final unrounded data may be slightly different. Percentage figures are similarly affected.Nôl i'r tabl cynnwys
The next release of UK 2011 Census statistics will provide Key and Quick statistics.Nôl i'r tabl cynnwys
ONS plans to publish a broad range of material for the UK, when equivalent or similar data become available for all the countries of the UK. Where possible these will be consistent datasets for the whole of the UK, including appropriate geographic breakdowns, collated in one place. These data will be available on the ONS website. We also aim to include a range of metadata and analysis, as well as providing a UK service to customers. An outline of the timetable for subsequent UK releases has been published via the ONS census prospectus.Nôl i'r tabl cynnwys
2011 Census estimates have been quality assured extensively, using other national and local sources of information for comparison and review by a series of quality assurance panels.
The UK statistics have been compiled by ONS from the three Census Offices (NRS, NISRA and ONS). The data used for UK statistics have been checked by each of these offices to ensure that they are the same as their individual published datasets. The compilation of these aggregate datasets into a single set of UK tables has been quality checked by another division within ONS to ensure that no errors occur in the compilation process.
Further information about the methodology and quality assurance processes for the 2011 Censuses in England and Wales, Scotland and Northern Ireland are available from their respective websites.
Local government bodies are known by different names in England, Wales, Scotland and Northern Ireland. In England, unitary authorities, metropolitan districts , non-metropolitan areas and London boroughs comprise the local authority tier of local government. In Wales, they are unitary authorities. In Scotland, they are council areas and in Northern Ireland they are district council areas.
Further information on these and other geographies in the UK can be found in the ONS Geography beginners guide.Nôl i'r tabl cynnwys
The census was successful in each of the countries of the UK, with the data collected targeted to meet specific national needs.Nôl i'r tabl cynnwys
The Office for National Statistics (ONS) is responsible for the 2011 Census for England and Wales, and additionally for disseminating census statistics for the UK.
National Records of Scotland (NRS) is responsible for the 2011 Census for Scotland (external link)
Northern Ireland Statistics and Research Agency (NISRA) is responsible for the 2011 Census for Northern Ireland (external link)
The census in all UK countries has been undertaken in a consistent manner. However, there are differences in some of the questions asked, processing, and detailed methodology. Further information is available from the individual websites.
A report detailing comparability between the three offices is now available to download from the UK Census web page.
As regards to differences between England and Wales: people in Wales were able to choose to complete their questionnaire (on paper or online) in Welsh, if they wished. Enquiry lines, advice and online guidance were also available in Welsh. An extra question was asked of people living in Wales, about the Welsh language.
ONS worked with many organisations in both England and Wales during the development and operation of the 2011 Census to reflect interests from both countries, such as establishing a Census Advisory Group for Wales that included representatives from Welsh Language Board, local authorities, businesses and voluntary organisations.
More information about the 2011 Census in Wales is available on the ONS website.Nôl i'r tabl cynnwys
In order to produce UK releases ONS have used only data that were published on or before the day of each UK release. These data do not disclose any details about individuals. Extensive security measures are taken to protect census data and these are described for each country on the following websites:Nôl i'r tabl cynnwys