List of Spanish regional legislatures
Since its transition to democracy in the late 1970s, Spain has been organized in a quasi-federal system called the "State of Autonomies". Each Autonomous Community is required by the Constitution to have its own three-branched system of government with its basic rules codified in a special law called a Statute of Autonomy, a sort-of regional constitution. Although there is no Constitutional requirement imposed upon regional elections other than that they must be based in proportional methods, all regional legislatures are unicameral, their members being elected in multi-member constituencies matching the provinces in the Autonomous Community with seats allocated to party lists using the D'Hondt method.
Autonomous Cities
The cities of Ceuta and Melilla are explicitly empowered by the Constitution to form Autonomous Communities on their own. Such provision was exercised by the respective City Councils in 1995, but not to its full extent: instead, the cities decided to adopt a regime between a normal city and a full-fledged Autonomous Community, with the main differences being:- The Assemblies of Ceuta and Melilla assume all the powers of the old City Councils, with the new Mayor-President assuming the role of the old Mayor. In particular, meetings of the Assemblies are presided over by the President of the City instead of having a separate Speaker of the Parliament like most legislatures.
- Their legislatures are not allowed to pass primary legislation except on matters specifically allowed by the Spanish Cortes. Nevertheless, they are allowed to pass secondary legislation regarding matters far beyond the normal competences of cities in Spain.
- In compensation for not being able to pass their own primary legislation, Ceuta and Melilla can formally introduce legislation in the Spanish Cortes, a privilege not held by other cities, not even the capital Madrid.
- Elections to the cities' legislatures are fixed not to a certain date, but to the date of the Spanish local elections. The writs are issued through a Royal Decree of the Spanish Government, while in all other Autonomous Communities it is the regional President who issues a decree dissolving the legislature and mandating elections to be held at the usually pre-fixed date.
| City | Legislature name Local name | Members | Mayor-President Party | Last election Fixed |
| Ceuta | Assembly of Ceuta Sp. Asamblea de Ceuta | 25 | Juan Jesús Vivas Lara People's Party | 24 May 2015 By Spanish law |
| Melilla | Assembly of Melilla Sp. Asamblea de Melilla | 25 | Juan José Imbroda Ortiz People's Party | 24 May 2015 By Spanish law |
Autonomous Communities
Except for Andalusia, the Basque Country, Catalonia and Galicia, which were created by a special fast procedure, most communities have very similar Statutes of Autonomy and election laws. Elections in those communities are fixed to a certain common date, which is currently "the fourth Sunday of May each four years", so regional Presidents cannot trigger a snap election nor select the final election date from a range of close dates. However, there have been occasions when the Speaker of the Legislative Assembly has been forced to call an out-of-sync election because the legislature was deadlocked in the President election. In those cases, the next election still takes place at the fixed common date, causing the new term out of the fresh elections to be shorter than normal: see President of Madrid#The 6th term scandal.On the other hand, Presidents of communities created by the "fast procedure" can select the actual election date and trigger snap elections, and have frequently done so, particularly in the Basque Country and Catalonia. The Andalusian elections are usually set to coincide with the Spanish general elections, but again, there is no requisite to that effect in the Andalusian legislation.
| Community | Legislature name Local names | Seat | Members | President | Last election Fixed |
| Andalusia | Andalusian Parliament Sp. Parlamento de Andalucía | Seville | 109 | Marta Bosquet C's | 2 December 2018 By President |
| Aragon | Aragonese Corts Ara. Cortz d'Aragón Sp. Cortes de Aragón | Zaragoza | 67 | Javier Sada PSOE | 26 May 2019 By President |
| Asturias | General Junta of the Principality of Asturias Ast. Xunta Xeneral del Principáu d'Asturies Sp. Junta General del Principado de Asturias | Oviedo | 45 | Marcelino Marcos PSOE | 26 May 2019 By law |
| Balearic Islands | Parliament of the Balearic Islands Cat. Parlament de les Illes Balears Sp. Parlamento de las Islas Baleares | Palma | 59 | Vicenç Thomàs PSIB | 26 May 2019 By President |
| Basque Country | Basque Parliament Ba. Eusko Legebiltzarra Sp. Parlamento Vasco | Vitoria-Gasteiz | 75 | Bakartxo Tejeria PNV | 25 September 2016 By President |
| Canary Islands | Canarian Parliament Sp. Parlamento de Canarias | Santa Cruz de Tenerife | 70 | Gustavo Adolfo Matos PSOE | 26 May 2019 By President |
| Cantabria | Parliament of Cantabria Sp. Parlamento de Cantabria | Santander | 35 | Joaquín Gómez PSC-PSOE | 26 May 2019 By law |
| Castile–La Mancha | Cortes of Castile-La Mancha Sp. Cortes de Castilla-La Mancha | Toledo | 33 | Pablo Bellido PSOE | 26 May 2019 By law |
| Castile and Leon | Cortes of Castile and León Sp. Cortes de Castilla y León | Valladolid | 81 | Luis Fuentes C's | 26 May 2019 By President |
| Catalonia | Parliament of Catalonia Cat. Parlament de Catalunya Oc. Parlament de Catalonha Sp. Parlamento de Cataluña | Barcelona | 135 | Roger Torrent ERC | 21 December 2017 :es:Aplicación del artículo 155 de la Constitución española de 1978 en Cataluña|By Spanish Prime Minister |
| Extremadura | Extremaduran Assembly Sp. Asamblea de Extremadura | Mérida | 65 | Blanca Martín PSOE | 26 May 2019 By President |
| Galicia | Parliament of Galicia Gal. Parlamento de Galicia Sp. Parlamento de Galicia | Santiago de Compostela | 75 | Miguel Ángel Santalices PPdeG | 25 September 2016 By President |
| La Rioja | Parliament of La Rioja Sp. Parlamento de La Rioja | Logroño | 33 | Jesús María García PSOE | 26 May 2019 By law |
| Madrid | Madrid Assembly Sp. Asamblea de Madrid | Madrid | 132 | Juan Trinidad C's | 26 May 2019 By law |
| Region of Murcia | Regional Assembly of Murcia Sp. Asamblea Regional de Murcia | Cartagena | 45 | Alberto Castillo C's | 26 May 2019 By law |
| Navarre | Parliament of Navarre Ba. Nafarroaku Parlamentua Sp. Parlamento de Navarra | Pamplona-Iruña | 50 | Unai Hualde GBai | 26 May 2019 By President |
| Valencian Community | Valencian Corts Val. Corts Valencianes Sp. Cortes Valencianas | Valencia | 99 | Enric Morera Compromís | 28 April 2019 By President |