The Basque Country or Basque Autonomous Community (/bæsk, bɑːsk/), also officially called Euskadi ([eus̺kadi]), is an autonomous community in northern Spain. It includes the Basque provinces of Araba, Bizkaia, and Gipuzkoa. It surrounds two enclaves called Treviño (Burgos) and Valle de Villaverde (Cantabria).

The Basque Country was granted the status of nationality, attributed by the Spanish Constitution of 1978. The autonomous community is based on the Statute of Autonomy of the Basque Country, a foundational legal document providing the framework for the development of the Basque people on Southern Basque Country. Parallelly, Navarre, which narrowly rejected a joint statute of autonomy in 1932, was granted a separate chartered statute in 1982.

Currently there is no official capital in the autonomous community, but the city of Vitoria-Gasteiz, in the province of Álava, is the de facto capital as the location of the Basque Parliament, the headquarters of the Basque Government, and the residence of the President of the Basque Autonomous Community (the Palace of Ajuria Enea). The High Court of Justice of the Basque Country has its headquarters in the city of Bilbao. Whilst Vitoria-Gasteiz is the largest municipality in area, with 277 km² (107 sq mi), Bilbao is the largest in population, with a population of 347,342, located in the province of Biscay within a conurbation of 875,552 people.

The term Basque Country may also refer to the larger cultural region (Basque: Euskal Herria), the home of the Basque people, which includes the autonomous community.

The following provinces make up the autonomous community:

The Basque Country borders Cantabria and the Burgos province to the west, the Bay of Biscay to the north, France (Nouvelle-Aquitaine) and Navarre to the east and La Rioja (the Ebro River) to the south. The territory has three distinct areas, which are defined by the two parallel ranges of the Basque Mountains. The main range of mountains forms the watershed between the Atlantic and Mediterranean basins. The highest point of the range is in the Aizkorri massif (1551 m). The three areas are:

Formed by many valleys with short rivers that flow from the mountains to the Bay of Biscay, like the Nervión, Urola or Oria. The coast is rough, with high cliffs and small inlets. The main features of the coast are the Bilbao Abra Bay and the Estuary of Bilbao, the Urdaibai estuary and the Bidasoa-Txingudi Bay that forms the border with France.

Between the two mountain ranges, the area is occupied mainly by a high plateau called Llanada Alavesa (the Álava Plains), where the capital Vitoria-Gasteiz is located. The rivers flow south from the mountains to the Ebro River. The main rivers are the Zadorra River and Bayas River.