A province in Spain^{[note 1]} is a territorial division defined as a collection of municipalities.^[1][2][3] The current provinces of Spain correspond by and large to the provinces created under the purview of the 1833 territorial re-organization of Spain, with a similar predecessor from 1822 (during the Trienio Liberal) and an earlier precedent in the 1810 Napoleonic division of Spain into 84 prefectures.^[4] There are many other groupings of municipalities that comprise the local government of Spain.

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Provinces of Spain
Category	Province
Location	Spain
Found in	Autonomous community
Created by	Royal Decree (30/11/1833)
Created	1833
Number	50
Populations	95,258–6,458,684
Areas	1,980–21,766 km²
Government	Provincial council
Subdivisions	Municipality

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The boundaries of provinces can only be altered by the Spanish Parliament,^[1] giving rise to the common view that the 17 autonomous communities are subdivided into 50 provinces. In reality the system is not hierarchical but defined according to jurisdiction (Spanish: competencias).^[5]

The body charged with government and administration of a province is the Provincial council, but their existence is controversial. As the province is defined as a "local entity" in the Constitution, the Provincial council belongs to the sphere of local government.

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The layout of Spain's provinces closely follows the pattern of the territorial division of the country carried out in 1833. The only major change of provincial borders since that time has been the division of the Province of Canary Islands into the provinces of Las Palmas and Santa Cruz de Tenerife.

Historically, the provinces served mainly as transmission belts for policies enacted in Madrid, as Spain was a highly centralised state for most of its modern history. The provinces were the "building-blocks" from which the autonomous communities were created following processed defined in the 1978 Constitution. Consequently, no province is divided between more than one of these communities.

The importance of the provinces has declined since the adoption of the system of autonomous communities in the period of the Spanish transition to democracy. They nevertheless remain electoral districts for national elections.

Provinces are also used as geographical references: for instance in postal addresses and telephone codes. National media will also frequently use the province to disambiguate small towns or communities whose names occur frequently throughout Spain. A small town would normally be identified as being in, say, Valladolid province rather than the autonomous community of Castile and León. In addition, organisations outside Spain use provinces for statistical analysis and policy making and in comparison with other countries including NUTS, OECD, FIPS, CIA World Factbook, ISO 3166-2 and the UN's Second Administrative Level Boundaries data set project (SALB).

Most of the provinces—with the exceptions of Álava, Asturias, Biscay, Cantabria, Gipuzkoa, the Balearic Islands, La Rioja, and Navarre—are named after their principal town. Only two capitals of autonomous communities—Mérida in Extremadura and Santiago de Compostela in Galicia—are not also the capitals of provinces.

Seven of the autonomous communities comprise no more than one province each: Asturias, the Balearic Islands, Cantabria, La Rioja, Madrid, Murcia, and Navarre. These are sometimes referred to as "uniprovincial" communities. Ceuta, Melilla, and the plazas de soberanía are not part of any province.

The table below lists the provinces of Spain. For each, the capital city is given, together with an indication of the autonomous community to which it belongs and a link to a list of municipalities in the province. The names of the provinces and their capitals are ordered alphabetically according to the form in which they appear in the main Wikipedia articles describing them. Unless otherwise indicated, their Spanish-language names are the same; locally valid names in Spain's other co-official languages (Basque, Catalan, which is officially called Valencian in the Valencian Community, Galician) are also indicated where they differ.