Soria (Spanish pronunciation: [ˈsoɾja]) is a city and municipality in the autonomous community of Castile and León in Spain, and capital of the province of Soria, located on the Douro river. It has a population of 40,654, representing 45.1% of the provincial population as of 2024. Situated at about 1,065 meters above sea level, Soria is the second highest provincial capital in Spain.

Although there are remains of settlements from the Iron Age and Celtiberian times, Soria itself enters history with its repopulation between 1109 and 1114, by the Aragonese king Alfonso I the Battler. A strategic enclave due to the struggles for territory between the kingdoms of Castile, Navarre and Aragon, Soria became part of Castile definitively in 1134, during the reign of Alfonso VII. Alfonso VIII was born in Soria, and Alfonso X had his court established when he received the offer to the throne of the Holy Roman Empire. In Soria, the deposed king James IV of Mallorca died, and John I of Castile married. Booming during the Late Middle Ages thanks to its border location and its control over the cattle industry, Soria went into a slow decline over the next few centuries. It was damaged greatly during the Peninsular War.

The city preserves an important architectural heritage (extensive medieval walls, Renaissance palaces and architecturally distinctive Romanesque churches) and is home to the Numantine Museum (with pieces from the nearby Celtiberian city of Numantia). Soria's football team CD Numancia is named after this city. It is one of the smallest cities to ever have had a team in Spain's top division La Liga.

Particularly important in its economy is the agri-food industry, while an increasing number of tourists are attracted by its cultural heritage. Soria was mentioned by UNESCO as a good example when including the Mediterranean diet in its Representative List of the Intangible Cultural Heritage of Humanity.

It is claimed that in Roman times there was a castle called Oria, purportedly named after a Greek knight called Doricus. Based on this folk etymology, some historians guessed that the first inhabitants of this city might have been the Dorians. Archaeology has not confirmed that story. Instead it has suggested that the first inhabitants were the Suebi, whose kings (as reported by Tutor and Malo in their Compedio historial de las dos Numancias) established one of their courts there. These two hypotheses have been abandoned because of lack of evidence. It seems more likely that the name Soria may have its origin in the word dauria from the river Durius (Douro).

The first recorded inhabitants in the area of Soria were the Celtiberians, around the 4th century BC.

After the fall of the Western Roman Empire, the rebuilt city was occupied by the Suebi. Later, after the Arab conquest of Spain, it grew in importance due to its proximity to the border of the Christian lands, which in the 8th century had settled along the Duero river.

In 869 Soria was the centre of the rebellion of Suleyman ibn-Abus against the emir of Córdoba, who sent his son Hakan to quench it.