White British is an ethnicity classification used in the 2011 United Kingdom Census. As a result of the 2011 census the White British population was estimated 51,736,290 (81.9% of the UK total population). (NB. This total includes the population estimate for Northern Ireland, where only the term 'White' is used in ethnic classification. National identity is listed separately in NI, where 40% classified themselves as British, making up a significant portion of the population, along with White Irish.)