Soria is a province of the center of Spain, in the part this of the independent community of Castile and Leon. She limits with the provinces of the Rioja, Zaragoza, Guadalajara, Segovia, and Towns. Its surface is of 10,287 km².
Soria is the populated Spanish province less, with a density of approximately 9 habitantes/km²: one of the minors of the European Union. The population of the province is of 91,487 hab. (2002), on which 40% live in the capital, Soria. The province has 183 municipalities, of which near half they are towns of less than 100 neighbors and only 12 of them have more than 1000 inhabitants.
Two regions are distinguished in her: the Earth of Ágreda, with capital in Ágreda, to the east being contiguous with Aragón and presided over by Moncayo, zone of orchards and forests, and the Soriana Plateau, land of cereals and beet in the fertile valley of the Duero. It would be necessary to also stand out, the North zone, in the limits with the Rioja, poor and non-uniform zone but with important resources of ignitas, and the Zone of Pine groves, where the Tips of Urbión, birthplace of the Duero and the mythical Black Lagoon are located that served as inspiration to Antonio Machado for its poem the Earth de Alvar González.