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Population and migration data catalogue

This data catalogue was updated on 12 March 2015.

Population - National Statistics

 

Measure Description Link to release (where possible this will include latest data) Source used in compendium commentary Comparability  Published by
Population estimates
Estimates of the usually resident population at 30 June. Estimates are provided at a range of geographic levels including: country, region, counties, unitary and local authorities, Scottish Council Areas and Northern Ireland Local Government Districts. UK and the four constituent countries Population Estimates for the UK, England and Wales, Scotland and Northern Ireland - Mid-2011 and Mid-2012 (Data used in compendium commentary relates to Mid-2012) Fully comparable
Population Estimates for UK, England, Wales, Scotland and Northern Ireland are fully comparable.  They are produced by Office for National Statistics (ONS), National Records of Scotland (NRS) and Northern Ireland Statistics and Research Agency (NISRA) using the cohort component method and use similar methods and data sources for each of the components.  They all refer to the same reference period (mid-year).  Although the figures for individual country data are not all released on the same day they are brought together in a UK release by ONS.
ONS
Population density
Population density tables showing the estimated number of usually resident people per square kilometre. England and Wales Population Estimates for the UK, England and Wales, Scotland and Northern Ireland - Mid-2013 (Table 002953) Fully comparable
Figures use population estimates (see notes above on comparability).
ONS
Scotland Mid-2011 and Mid-2012 Population Estimates Scotland (Table 8b) NRS
Northern Ireland Population densities: 1981-2012 NISRA
Population by country of birth and nationality
The estimated number of people usually resident in the four constituent countries of the UK by country of birth and by nationality (Annual Population Survey (APS) data). England and Wales (national and sub-national), Scotland (national level) and Northern Ireland (national level) Fully comparable 
Figures produced by ONS for all four nations.
ONS
Scotland (sub-national level) Not comparable
Not comparable at sub-national level as not available for Northern Ireland, and although data for England and Wales and for Scotland are based on the same data source (APS), different suppression techniques are used by ONS and NRS.
NRS
The estimated number of people usually resident in each of the four constituent countries of the UK by country of birth (2011 Census data). England and Wales 2011 Census, Quick Statistics for England and Wales on National Identity, Passports Held and Country of Birth (Table QS213EW)  Fully comparable 
Figures are produced separately by ONS, NRS and NISRA using data from the 2011 Census of England and Wales, Scotland and Northern Ireland respecitively,  but using same methods and standards.
ONS
Scotland Country of Birth (Basic) NRS
Northern Ireland Census 2011: Key Statistics for Northern Ireland - Country of Birth (Table KS204NI in Key Statistics for Northern Ireland (PDF)) NISRA
Population projections The projected population size by age and sex for the UK and four constituent countries. UK and the four constituent countries 2012-based National Population Projections 

Fully comparable
National Population Projections for the UK, England, Wales, Scotland and Northern Ireland are fully comparable. They are produced by ONS on behalf of NRS, NISRA and Welsh Government (WG) using the same methods and sources.

ONS
Sub-national Population Projections. England

Partially comparable
Sub-national Population Projections are partially comparable. They are produced separately by ONS, WG, NRS and NISRA and use similar methods. However, the figures for Wales are not constrained to the National Population Projections and users need to be aware of this difference when making comparisons. In addition, ONS, WG and NRS produce 25 year projections whereas NISRA produce 15 year projections.

Currently, sub-national population projections are based on 2012 population estimates for England and Scotland, 2011 population estimates for Wales and 2008 population estimates for Northern Ireland.

ONS
Wales WG
Scotland NRS
Northern Ireland NISRA
Population projections by marital status covering both legal marital status and (opposite sex) co-residential cohabitation. England and Wales Fully comparable 
Figures are produced by ONS (based on 2008 population estimates) but not for all four nations.
ONS
Prison population
The population of prisons. England & Wales

Partially comparable
England and Wales prison population statistics are fully comparable as they are covered by the same data source and underlying prison system.

England and Wales prison population statistics are partially comparable with Scotland and with Northern Ireland. Scotland's Prison Numbers include those unlawfully at large whereas Northern Ireland and England and Wales do not. In addition, the Prison figures for Northern Ireland do not include for the most part information on those aged under 18, as they are sentenced to custody in the Juvenile Justice Centre and these numbers are reported separately. However, with this aside, the data sources are all administrative systems with 100% coverage and they have broadly the same statistical definitions/categories.

Ministry of Justice (MoJ)
Scotland Scottish Government 
Northern Ireland Department of Justice Northern Ireland (DOJNI)
Prison population projections The projected population in prisons in England & Wales and Scotland. England & Wales Partially comparable
Statistics are produced by different producers and include some differences around definition of the population base.
MoJ
Scotland Scottish Government
Population ageing Annual population estimates of the very old: Single year estimates by age and sex from age 85/90 to 104 and 105 and over. England and Wales Partially comparable 
Figures are produced from separate sources of data.  Methods and standards are broadly comparable, although there are clear differences in systems. Specifically, ONS, NISRA and NRS all use the Kannisto-Thatcher method, however, Scotland and Northern Ireland calculate the population estimates using deaths on a mid year basis whereas ONS use deaths on a calendar year basis.
ONS
Scotland NRS
Northern Ireland NISRA
UK armed forces personnel Location of service and civilian personnel (UK armed forces only) in the UK at 1 April. England, Wales, Scotland and Northern Ireland (Table 2.03.2)

Fully comparable
Figures are produced by one body for all four nations.

Ministry of Defence (MoD)
Fertility
The average number of live children a group of women would each have if they experienced the age-specific fertility rates for the calendar year in question throughout their childbearing lifespan. England and Wales Birth Summary Tables, England and Wales, 2012

Fully comparable
Figures are produced separately by ONS, NRS and NISRA from separate sources of data.
While data for England and Wales are based on birth occurrences, and data for Scotland and Northern Ireland are based on birth registrations, the differences that this introduces are considered to be minor and do not affect the comparability of the statistics.

The population estimates used in the calculation of the total fertility rates for 2011 (and all subsequent years) take into account the results of the 2011 Census.

ONS
Scotland Vital Events Reference Tables 2012 NRS
Northern Ireland Registrar General Annual Report 2012 (2012 Section 3 – Tables 3.1 to 3.22) NISRA
Mortality Age standardised mortality rate per 1,000 population for males and females (age-standardised rates allow for differences in the age structure of populations). UK and the four constituent countries

Fully comparable
Figures are produced by ONS for all four nations.

National Records of Scotland and Northern Ireland Statistics and Research Agency also publish Age Standardised Mortality Rates (ASMRs) for Scotland and Northern Ireland respectively, based on population data only. ASMRs published for all four constituent countries of the UK by ONS use live births instead of the population aged under 1.

ONS
Life expectancy Number of years a person could expect to live from birth and at age 65 based on mortality rates. UK and the four constiuent countries National Life Tables, 2010-2012

Fully comparable
Fully comparable at the national level, produced by ONS.  

ONS
Sub-national life expectancy. UK and the four constiuent countries

Fully comparable
Fully comparable at the national level, produced by ONS. 

ONS
National identity National identity (or identities) with which the population of the four constituent countries of the UK associate themselves. England and Wales 2011 Census, Quick Statistics for England and Wales on National Identity, Passports Held and Country of Birth (Table QS214EW) Fully comparable
National identity statistics are fully comparable for England, Wales and Scotland at the national level. 
ONS
Scotland Census 2011 - Key results on Population, Ethnicity, Identity etc, Scotland (Statistical Bulletin – Release 2A, Table 6 – National Identity, Scotland, 2011) NRS
Northern Ireland Census 2011: Key Statistics for Northern Ireland - National Identity (Classification 1) (Table KS202NI) Partially comparable
Northern Ireland has not been included in the commentary on National Identity as the data available are not fully comparable to those for England, Wales and Scotland. This is due to differences in the possible responses on the Northern Ireland Census compared to the Census for England and Wales and Scotland. Specifically, the response options for England and Wales and Scotland began respectively with English, Welsh and Scottish, followed by the national identities of the other UK countries, British and Other.  In contrast, the response options for Northern Ireland began with British and Irish, followed by Northern Irish, the national identities of the other UK countries and Other.
NISRA
Families and Households Family types, households by type, household size and people living alone for the UK. UK UK level only ONS
Baby names Most popular forenames for babies born (or registered) in 2012. England and Wales Baby names, England and Wales - 2012

Fully comparable 
Fully comparable at national level.

Note that ONS baby name statistics are for babies born in a particular year, whilst NRS and NISRA baby name statistics are for babies whose birth was registered in a particular year.  Differences between reporting occurences and registrations are minor and the figures across the four nations are comparable.

ONS
Scotland Babies' First Names 2012 NRS
Northern Ireland First Names Bulletin, 2012 NISRA

Migration - National Statistics

 

Measure Description Link to release (where possible this will include latest data) Source used in compendium commentary Comparability Published by
International Migration Estimates of the number of long-term international migrants to and from the UK and the four constituent countries. UK and the four constituent countries Long-Term International Migration - 2012: Table 2.06 LTIM Area of Destination or Origin within the UK, 1991-2012 Fully comparable
International Migration for UK, England, Wales, Scotland and Northern Ireland are fully comparable.  The figures quoted are produced by ONS using the same methods and sources. The main sources used to produce the long-term international migration estimates are the International Passenger Survey (IPS), the Labour Force Survey (LFS), Home Office data on asylum seekers and their dependents and data on GP registrations in Northern Ireland from NISRA.
ONS
Allocations of National Insurance Numbers (NINos) to adult overseas nationals. UK, Scotland, Wales, Northern Ireland and English regions Fully comparable Department for Work and Pensions (DWP)
Internal Migration Estimates of internal migration within England and Wales, Scotland and Northern Ireland. England and Wales Partially comparable
Internal Migration data are partially comparable.  They are produced separately by ONS, NRS and NISRA using health records.  ONS and NISRA also make a student adjustment using data from the Higher Education Statistics Agency and users should be aware of this difference when making comparisons.
ONS
Scotland NRS
Northern Ireland NISRA
Content from the Office for National Statistics.
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