
In Spain, an autonomous community is a first-level political and administrative division, created in accordance with the Spanish constitution of 1978, with the aim of guaranteeing limited autonomy of the nationalities and regions that make up Spain.

Andalusia is the southernmost autonomous community in Peninsular Spain. It is the most populous and the second largest autonomous community in the country. The Andalusian autonomous community is officially recognised as a "historical nationality". The territory is divided into eight provinces: Almería, Cádiz, Córdoba, Granada, Huelva, Jaén, Málaga, and Seville. Its capital city is Seville. The seat of the High Court of Justice of Andalusia is located in the city of Granada.

Aragon is an autonomous community in Spain, coextensive with the medieval Kingdom of Aragon. In northeastern Spain, the Aragonese autonomous community comprises three provinces : Huesca, Zaragoza, and Teruel. Its capital is Zaragoza. The current Statute of Autonomy declares Aragon a historic nationality of Spain.

Asturias, officially the Principality of Asturias, is an autonomous community in northwest Spain.

The Balearic Islands are a Spanish archipelago in the Balearic Sea, near the eastern coast of the Iberian Peninsula.

The Basque Country, officially the Basque Autonomous Community is an autonomous community in northern Spain. It includes the Basque provinces of Álava, Biscay, and Gipuzkoa.

The Canary Islands, also known informally as the Canaries, is a Spanish archipelago in the Atlantic Ocean, in a region known as Macaronesia. At their closest point to the African mainland, they are 100 kilometres west of Morocco. They are the southernmost of the autonomous communities of Spain, and are located in the African Tectonic Plate. The archipelago is economically and politically European, and is part of the European Union.

Cantabria is an autonomous community in northern Spain with Santander as its capital city. It is called a comunidad histórica, a historic community, in its current Statute of Autonomy. It's bordered on the east by the Basque autonomous community, on the south by Castile and León, on the west by the Principality of Asturias, and on the north by the Cantabrian Sea.

Castile and León is an autonomous community in north-western Spain.

Castilla–La Mancha, or Castile La Mancha, is an autonomous community of Spain. Comprising the provinces of Albacete, Ciudad Real, Cuenca, Guadalajara and Toledo, it was created in 1982. The government headquarters are in Toledo.

Catalonia is an autonomous community in the northeastern corner of Spain, designated as a nationality by its Statute of Autonomy.

Extremadura is an autonomous community of Spain. Its capital city is Mérida. Located in the central-western part of the Iberian Peninsula, it is made up of the two largest provinces of Spain: Cáceres and Badajoz. Extremadura is bordered by Portugal to the west and by the autonomous communities of Castile and León (north), Castilla–La Mancha (east) and Andalusia (south). Its official language is Spanish.

Galicia is an autonomous community of Spain and historic nationality under Spanish law. Located in the northwest Iberian Peninsula, it includes the provinces of A Coruña, Lugo, Ourense and Pontevedra.

La Rioja is an autonomous community and province in Spain, in the north of the Iberian Peninsula. Its capital is Logroño. Other cities and towns in the province include Calahorra, Arnedo, Alfaro, Haro, Santo Domingo de la Calzada, and Nájera. It has an estimated population of 315,675 inhabitants, making it the least populated region of Spain.

The Community of Madrid is one of the seventeen autonomous communities of Spain. It is located in the centre of the Iberian Peninsula, and of the Central Plateau . Its capital is the city of Madrid, which is also the capital of the country. The Community of Madrid is bounded to the south and east by Castilla–La Mancha and to the north and west by Castile and León. It was formally created in 1983, based on the limits of the province of Madrid, which was until then conventionally included in the historical region of New Castile.

The Region of Murcia, is an autonomous community of Spain located in the southeast part of the Iberian Peninsula, on the Mediterranean coast. The region is centered on a historical region of the same name in what is now southeastern Spain. It is heir to the ancient Kingdom of Murcia, which traditionally included, as a bi-provincial region, the provinces of Albacete and Murcia. During the transition to democracy, Albacete became part of Castilla–La Mancha. The region is 11,313 km2 (4,368 sq mi) in area and had a population of 1,511,251 as at the start of 2020. About one-third of its population lives in the capital, Murcia. At 2,014 m (6,608 ft), the region's highest point is Los Obispos Peak in the Massif of Revolcadores.

Navarre, officially the Chartered Community of Navarre, is an autonomous community and province in northern Spain, bordering the Basque Autonomous Community, La Rioja, and Aragon in Spain and Nouvelle-Aquitaine in France. The capital city is Pamplona. The present-day province makes up the majority of the territory of the medieval Kingdom of Navarre, a long-standing Pyrenean kingdom that occupied lands on both sides of the western Pyrenees, with its northernmost part, Lower Navarre, located in the southwest corner of France.

In Spain, a president of an Autonomous Community serves as the chief executive officer in each of the seventeen Autonomous communities and in the two Autonomous cities, where they receive the name of "Mayor-Presidents". As such, regional presidents are responsible for implementing regional laws and overseeing the operation of the state executive branch. As regional leaders, governors advance and pursue new and revised policies and programs using a variety of tools, among them executive laws, executive budgets, and legislative proposals.

The Valencian Community is an autonomous community of Spain. It is the fourth most populous autonomous community after Andalusia, Catalonia and Madrid with more than five million inhabitants. Its homonymous capital Valencia is the third largest city and metropolitan area in Spain. It is located along the Mediterranean coast on the east side of the Iberian peninsula. It borders with Catalonia to the north, Aragon and Castilla–La Mancha to the west, and Murcia to the south. The Valencian Community consists of three provinces which are Castellón, Valencia and Alicante.