Autonomous communities of Spain

The autonomous communities (Spanish: comunidades autónomas, singular: comunidad autónoma) are the first-level administrative divisions of Spain, created in accordance with the Spanish Constitution of 1978, with the aim of guaranteeing limited autonomy to the nationalities and regions that make up Spain.

There are 17 autonomous communities and two autonomous cities (Ceuta and Melilla) that are collectively known as "autonomies". The two autonomous cities have the right to become autonomous communities.

The autonomous communities exercise their right to self-government within the limits set forth in the constitution and organic laws known as Statutes of Autonomy, which broadly define the powers that they assume.

Each statute sets out the devolved powers (Spanish: competencia) for each community; typically those communities with stronger local nationalism have more powers, and this type of devolution has been called asymmetrical which is on the whole seen as advantageous, able to respond to diversity.

Despite the Constitution not setting a mandatory legislative chamber framework, all autonomous communities have chosen unicameralism. All such governments have legislative and executive branches of government but not judicial.

Decentralisation model

The Spanish model is generally considered by foreign political scientists and scholars as "a federal system with certain peculiarities". However it is also described as a decentralised unitary country. While sovereignty is vested in the nation as a whole, represented in the central institutions of government, the nation has, to varying degrees, devolved power to the communities.