Demographics
The Basque Country has a population of approximately 3 million as of early 2006. The population density, at about 140/km² (360/sq. mile) is above average for both Spain and France, but the distribution of the population is fairly unequal, concentrated around the main cities. A third of the population is concentrated in the Greater Bilbao metropolitan area, while most of the interior of the French Basque Country and some areas of Navarre remain sparsely populated: density culminates at about 500/km² for Biscay but falls to 20/km² in the northern inner provinces of Lower Navarre and Soule.
A significant majority of the population of the Basque country live inside the Basque Autonomous Community (about 2,100,000, or 70% of the population) while about 600,000 live in Navarre (20% of the population) and about 300,000 (roughly 10%) in Northern Basque Country.
José Aranda Aznar writes that 30% of the population in the Basque Country Autonomous Community were born in other regions of Spain and that 40% of the people living in that territory do not have a single Basque parent.
Most of these peoples of Galician and Castilian stock arrived in the Basque Autonomous Community in the late 19th century and throughout the 20th century, as the region became more and more industrialized and prosperous and additional workers were needed to support the economic growth. Descendants of immigrants from other parts of Spain have since been considered Basque for the most part, at least formally.
Over the last 25 years, some 380,000 people have left the Basque Autonomous Community, of which some 230,000 have moved to other parts of Spain. While certainly many of them are people returning to their original homes when starting their retirement, according to anti-Basque nationalist sources there is also a sizable tract of Basque natives in this group who have moved due to a Basque nationalist political environment (including ETA's killings) which they perceive as overtly hostile. These have been quoted to be as high as 10% of the population in the Basque Community.
Read more about this topic: Basque Country (greater Region)