"Population and housing census. Population structure" is intended to provide information on the number of residents in the C. A of the Basque Country, in addition to its spatial distribution by municipality, district, section, entity. The population by neighbourhood is made in municipalities with more than 10,000 inhabitants. The description of the population is made by means of demographic variables such as sex, age, place of birth and nationality. This operation provides information as of January 1 of each year since 2001, now providing information as of July 1 as of 2022. The main source is the administrative register of the Municipal Register, in addition to others such as the Birth Statistics and the Death Statistics.