1987 Extremaduran regional election

The 1987 Extremaduran regional election was held on Wednesday, 10 June 1987, to elect the 2nd Assembly of the autonomous community of Extremadura. All 65 seats in the Assembly were up for election. The election was held simultaneously with regional elections in twelve other autonomous communities and local elections all throughout Spain, as well as the 1987 European Parliament election.

The Spanish Socialist Workers' Party (PSOE) won the election with a new absolute majority of seats, albeit losing 1 seat from its 1983 result. The People's Alliance (AP), which had undergone an internal crisis after the breakup of the People's Coalition in 1986, lost support and fell from the coalition's 30% of the share to 24%, losing 3 seats as a result.

The main election winner was the centrist Democratic and Social Centre (CDS), a party led by the former Spanish Prime Minister Adolfo Suarez, which entered the Assembly for the first with 8 seats and 12% of the vote, becoming the only party within the Assembly that made gains, as all others (including regionalist United Extremadura (EU)) lost votes. United Left, an electoral coalition comprising the Communist Party of Spain and other left-wing parties, also lost 2 seats.

Electoral system
The Assembly of Extremadura was the devolved, unicameral legislature of the autonomous community of Extremadura, having legislative power in regional matters as defined by the Spanish Constitution and the Extremaduran Statute of Autonomy, as well as the ability to vote confidence in or withdraw it from a regional president.

Voting for the Assembly was on the basis of universal suffrage, which comprised all nationals over 18 years of age, registered in Extremadura and in full enjoyment of their political rights. The 65 members of the Assembly of Extremadura were elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of five percent of valid votes—which included blank ballots—being applied in each constituency. Alternatively, parties failing to reach the threshold in one of the constituencies were also entitled to enter the seat distribution as long as they ran candidates in both districts and reached five percent regionally. Seats were allocated to constituencies, corresponding to the provinces of Badajoz and Cáceres, with each being allocated an initial minimum of 20 seats and the remaining 25 being distributed in proportion to their populations.

The electoral law provided that parties, federations, coalitions and groupings of electors were allowed to present lists of candidates. However, groupings of electors were required to secure the signature of at least 2 percent of the electors registered in the constituency for which they sought election. Electors were barred from signing for more than one list of candidates. Concurrently, parties and federations intending to enter in coalition to take part jointly at an election were required to inform the relevant Electoral Commission within ten days of the election being called.

Election date
The term of the Assembly of Extremadura expired four years after the date of its previous election. The election Decree was required to be issued no later than the twenty-fifth day prior to the date of expiry of parliament and published on the following day in the Official Journal of Extremadura, with election day taking place between the fifty-fourth and the sixtieth day from publication and set so as to make it coincide with elections to the regional assemblies of other autonomous communities. The previous election was held on 8 May 1983, which meant that the legislature's term would have expired on 8 May 1987. The election Decree was required to be published no later than 14 April 1987, with the election taking place no later than the sixtieth day from publication, setting the latest possible election date for the Assembly on Saturday, 13 June 1987.

The Assembly of Extremadura could not be dissolved before the date of expiry of parliament except in the event of an investiture process failing to elect a regional president within a two-month period from the first ballot. In such a case, the Assembly was to be automatically dissolved and a snap election called, with elected deputies merely serving out what remained of their four-year terms.

Opinion polls
The table below lists voting intention estimates in reverse chronological order, showing the most recent first and using the dates when the survey fieldwork was done, as opposed to the date of publication. Where the fieldwork dates are unknown, the date of publication is given instead. The highest percentage figure in each polling survey is displayed with its background shaded in the leading party's colour. If a tie ensues, this is applied to the figures with the highest percentages. The "Lead" column on the right shows the percentage-point difference between the parties with the highest percentages in a poll. When available, seat projections determined by the polling organisations are displayed below (or in place of) the percentages in a smaller font; 33 seats were required for an absolute majority in the Assembly of Extremadura.