10. España Capital (and largest city) Madrid Official language(s) Spanish Recognised regional languages Basque, Catalan/Valencian, Galician Demonym Spanish, Spaniard Government Unitary parliamentary democracy and Constitutional monarchy - King: Juan Carlos I - Prime Minister: José Luis Rodríguez Zapatero (PSOE) Area 504,030 km2 Population 2010 estimate: 46,030,109 Currency Euro (€) (EUR)