The main organ of the Ayuntamiento is the plenary, the deliberative body formed by the elected councillors, and presided by the alcalde (English: Mayor).
[9] The concejo abierto ("open council") is the system used for the government and administration of low-population municipalities and some minor local entities.
However, in six of the 17 autonomous communities (Asturias, Cantabria, La Rioja, Madrid, Murcia, and Navarre), the functions of the only provincial council are assumed by the regional government.
Comarcas are groupings of municipalities, established by regional governments, principally in Catalonia, Aragon and the Basque Country but also one in Castile and León.
There are a variety of other administrative bodies which are highly dependent on the particular regional legislation including: The number of registered local entities in June 2022 is shown in the following table.