Biscay is one of the 52 constituencies represented in the Congress of Deputies, the lower chamber of the Spanish parliament, the Cortes Generales. The constituency currently elects eight deputies. Its boundaries correspond to those of the Spanish province of Biscay. The electoral system uses the D'Hondt method and a closed-list proportional representation, with a minimum threshold of three percent.
Biscay is one of the three constituencies represented in the Basque Parliament, the regional legislature of the Basque Autonomous Community. The constituency currently elects 25 deputies. Its boundaries correspond to those of the Spanish province of Biscay. The electoral system uses the D'Hondt method and a closed-list proportional representation, with a minimum threshold of three percent.
Asturias—Oviedo until 1986—is one of the 59 constituencies represented in the Senate, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Asturias. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
A Coruña is one of the 59 constituencies represented in the Senate, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of A Coruña. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Barcelona is one of the 59 constituencies represented in the Senate, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Barcelona. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Burgos is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Burgos. The electoral system uses limited voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Cantabria is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Cantabria. The electoral system uses limited voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Granada is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Granada. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Guadalajara is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Guadalajara. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Gipuzkoa is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Gipuzkoa. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Jaén is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Jaén. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
La Rioja is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of La Rioja. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Lugo is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Lugo. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Málaga is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Málaga. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Cáceres is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects four senators. Its boundaries correspond to those of the Spanish province of Cáceres. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to three candidates.
Mallorca is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects three senators. Its boundaries correspond to those of the island of Mallorca. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties. Electors can vote for up to two candidates.
Menorca is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects one senator. Its boundaries correspond to those of the island of Menorca. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties.
Ibiza–Formentera is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects one senator. Its boundaries correspond to those of the islands of Ibiza and Formentera. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties.
La Gomera is one of the 59 constituencies represented in the Senate, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects one senator. Its boundaries correspond to those of the island of La Gomera. From 1977 to 1979 it also included the island of El Hierro. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties.
Lanzarote is one of the 59 constituencies represented in the Senate of Spain, the upper chamber of the Spanish parliament, the Cortes Generales. The constituency elects one senator. Its boundaries correspond to those of the island of Lanzarote. The electoral system uses an open list partial block voting, with electors voting for individual candidates instead of parties.
1,152,651 (2019) [1] 
