Elections in Spain

There are four types of elections in Spain: general elections, elections to the legislatures of the autonomous communities (regional elections), local elections and elections to the European Parliament. General elections and elections to the legislatures of the autonomous communities are called after the mandate of the national or regional legislature expires, usually four years after the last election, although early elections may occur. Elections to local councils (municipal and insular) and to the European Parliament are held on fixed dates but some local government bodies (including provincial councils) are not directly elected. For most elections party list PR is used, but the plurality system is used for the Senate.

General elections

General elections are elections held for the national legislature, which is called in Spain Cortes Generales ( Spanish for "General Courts") and consists of two chambers, the Congress of Deputies and the Senate. The Congress and Senate usually serve concurrent terms that run for a maximum of four years. However, the Prime Minister has the prerogative to dissolve both Houses at any given time either jointly or separately.

Congress of Deputies

The Congress is composed of 350 members directly elected by universal adult suffrage for a four-year term of office. Each one of Spain's fifty provinces is a constituency entitled to an initial minimum of two seats; the cities of Ceuta and Melilla elect one member each. The remaining 248 seats are allocated among the fifty provinces in proportion to their populations. Parties, federations, coalitions and ''agrupaciones de electores'' (electors' groups) may present candidates or lists of candidates. The lists are closed, so electors may not choose individual candidates in or alter the order of such lists. Electors cast a ballot for a single list, or for a single candidate in Ceuta and Melilla.

The seats in each constituency are apportioned according to the largest average method of proportional representation (PR), conceived by the Belgian mathematician Victor d'Hondt in 1899 (d'Hondt method). However, in order to participate in the allocation of seats, a list must receive at least three percent of all valid votes cast in the constituency, including blank ballots. The single-member seats in Ceuta and Melilla are filled by the plurality or first-past-the-post method, under which the candidate obtaining the largest number of votes in the constituency is elected.

;Seat allocation in Congress

To illustrate the functioning of the system, the allocation of seats in the three provinces of the Self-Governing or Autonomous Community of Aragón - Huesca, Teruel and Zaragoza - for the June 1993 general election is presented here in detail. At the time, Zaragoza province had seven seats in Congress, while both Huesca and Teruel had three.

In Zaragoza province, only four tickets, namely the Spanish Socialist Workers Party (PSOE), the Popular Party (PP), the Aragonese Party (PAR) and the United Left (IU) won at least three percent of the valid votes cast in the election - including blank ballots - and were thus entitled to participate in the allocation of constituency seats. The tickets were sorted by number of votes from top to bottom, and the votes polled by each of these were then divided by 1, 2, 3, and so on until the number of seats to be allocated was reached, as detailed below:

Seats were then awarded to the tickets obtaining the largest quotients or averages (shown in bold). As indicated, the PSOE won three seats, the PP two, the PAR one and IU one. The seats won by each ticket were awarded to the candidates included therein, according to their ranking on the lists: therefore, the first three candidates on the PSOE list were elected to Congress, as were the first two candidates on the PP list and the candidates at the top of the PAR and IU lists, respectively.

Meanwhile, the results of the election in Huesca province were as follows:

The effective representation threshold in Huesca was 25,360 votes, or 19.0% of the valid vote.

Finally, the outcome of the election in Teruel was the following:

The effective representation threshold in Teruel was 18,163 votes, or 20.2% of the valid vote.

Having concluded the allocation of Congress seats in the three Aragón constituencies, the following peculiarities stand out:

# The effective representation threshold in each province was substantially larger than the three percent barrier set forth by law: in all three constituencies, the seat apportionment would have been the same regardless of the statutory threshold.
# The number of votes required to attain a seat in Zaragoza province - the largest of three constituencies - was substantially higher than the amount required to that end in Huesca or in Teruel.
# The proportional allocation of seats in each constituency appeared to favor the major parties in general and specifically the majority party.

Senate

The system for electing the Senate was first used in 1979, though with regard to the provinces the system is unchanged since 1977. Senators are elected directly from the provinces and indirectly from the autonomous communities; currently, there are 264 senators, 208 directly elected and 56 indirectly elected.

In the provinces, a majoritarian partial block voting system is used. All peninsular provinces elect four senators each; the insular provinces ( Balearic and Canary Islands) elect one or three senators per island, and Ceuta and Melilla elect two senators each. Parties nominate three candidates; each voter has three votes (fewer in those constituencies electing fewer senators) and votes for candidates by name, the only instance of personal voting in Spanish national elections. The usual outcome is three senators for the party with the most votes, and one senator for the runner-up, except in very close races.

The autonomous communities receive one senator, plus one for each million inhabitants. They are entitled to determine how they choose their senators but are generally elected by the legislature of the respective community in proportion to its party composition.

Election results 1977–2019

Regional elections

*1983 Spanish regional elections
*1987 Spanish regional elections
*1991 Spanish regional elections
*1995 Spanish regional elections
*1999 Spanish regional elections
*2003 Spanish regional elections
* 2007 Spanish regional elections
* 2011 Spanish regional elections
*2015 Spanish regional elections
* 2019 Spanish regional elections
*2020 Spanish regional elections