Population estimates by single year of age for age 0-25

Created 2 years ago, updated 5 months ago

Estimates for mid-2012 to mid-2016 have been revised. Methodological improvements have been implemented allowing the creation of a new series of estimates that roll forward the 2011 Census. These revised figures include new estimates of local authority international emigration and foreign armed forces dependants.


Notes and Definitions

1. It is ONS policy to publish population estimates rounded to at least the nearest hundred persons. These unit-level estimates are provided to enable and encourage further calculations and analysis. However, the estimates cannot be guaranteed to be as exact as the level of detail implied by unit-level data. ONS request that data are rounded to the nearest 100 if quoted in any publication, documentation or similar.

2. The estimated resident population of an area includes all people who usually live there, whatever their nationality. People arriving into an area from outside the UK are only included in the

population estimates if their total stay in the UK is 12 months or more. Visitors and short term migrants (those who enter the UK for 3 to 12 months for certain purposes) are not included.

Similarly, people who leave the UK are only excluded from the population estimates if they remain outside the UK for 12 months or more. This is consistent with the United Nations

recommended definition of an international long-term migrant. Members of UK and non-UK armed forces stationed in the UK are included in the population and UK forces stationed outside

the UK are excluded. Students are taken to be resident at their term time address.

3. At a subnational level, the population estimates reflect the administrative boundaries in place on 1 April 2011.

4. Local estimates are now calculated by single year of age; but these figures are less reliable and we advise that single year of age data for local areas should be aggregated to at least

five-year age groupings for use in further calculations, onwards circulation, or for presentation purposes. (Splitting into 0 year olds and 1-4 year olds is an acceptable exception).