Zaragoza, also called Saragossa, is the capital city of the Zaragoza province and of the autonomous community of Aragon, Spain. It lies by the Ebro river and its tributaries, the Huerva and the Gallego, roughly in the center of both Aragon and the Ebro basin.

On 1 September 2010 the population of the city of Zaragoza was 701,090, within its administrative limits on a land area of 1,062.64 square kilometres (410.29 square miles), ranking fifth in Spain. It is the 32nd most populous municipality in the European Union. The population of the metropolitan area was estimated in 2006 at 783,763 inhabitants. The municipality is home to more than 50 percent of the Aragonese population. The city lies at an elevation of 199 metres (653 feet) above sea level.

Zaragoza hosted Expo 2008 in the summer of 2008, a world's fair on water and sustainable development. It was also a candidate for the European Capital of Culture in 2012.

The city is famous for its folklore, local gastronomy, and landmarks such as the Basilica del Pilar, La Seo Cathedral and the Aljaferia Palace. Together with La Seo and the Aljaferia, several other buildings form part of the Mudejar Architecture of Aragon which is a UNESCO World Heritage Site. The Fiestas del Pilar are among the most celebrated festivals in Spain.

Near the basilica on the banks of the Ebro are located the city hall, the Lonja (old currency exchange), La Seo (literally "the See" in the Aragonese language) or Cathedral of San Salvador, a church built over the main mosque (partially preserved in the 11th-century north wall of the Parroquieta), with Romanesque apses from the 12th century; inside, the imposing hallenkirche from the 15th to 16th centuries, the Baroque tower, and finally, with its famous Museum of Tapestries near the Roman ruins of forum and port city wall.

Some distance from the centre of the old city is the Moorish castle (or palace) Aljafería, the most important Moorish buildings in northern Spain and the setting for Giuseppe Verdi's opera Il trovatore (The Troubadour). The Aragonese parliament currently sits in the building.

The churches of San Pablo, Santa Maria Magdalena and San Gil Abad were built in the 14th century, but the towers may be old minarets dating from the 11th century; San Miguel (14th century); Santiago (San Ildefonso) and the Fecetas monastery are Baroque with Mudejar ceilings of the 17th century. All the churches are Mudejar monuments that comprise a World Heritage Site.

Other important sights are the stately houses and palaces in the city, mainly of the 16th century: palaces of the count of Morata or Luna (Audiencia), Dean, Torrero (colegio de Arquitectos), Don Lope or Real Maestranza, count of Sastago, count of Argillo (today the Pablo Gargallo museum), archbishop, etc.

On 14 June 2008, the site of Expo 2008 opened its doors to the public. The exhibition ran until 14 September.