Madrid is the capital of Spain and the largest municipality in both the Community of Madrid and Spain as a whole. The city has almost 3.166 million inhabitants with a metropolitan area population of approximately 6.5 million. It is the third-largest city in the European Union (EU) after London and Berlin, and its monocentric metropolitan area is the third-largest in the EU after those of London and Paris. The municipality itself covers an area of 604.3 km2 (233.3 sq mi).

Madrid lies on the River Manzanares in the centre of both the country and the Community of Madrid (which comprises the city of Madrid, its conurbation and extended suburbs and villages); this community is bordered by the autonomous communities of Castile and León and Castile-La Mancha. As the capital city of Spain, seat of government and residenceof the Spanish monarch, Madrid is also the political, economic and cultural centre of the country. The current mayor is Manuela Carmena from the party Ahora Madrid.

Madrid houses the headquarters of the World Tourism Organization (UNWTO), belonging to the United Nations Organization (UN), the Ibero-American General Secretariat (SEGIB), the Organization of Ibero-American States (OEI), and the Public Interest Oversight Board (PIOB).