Affected by their national trends, the Spanish Socialist Workers' Party (PSOE) and the People's Alliance (AP) lost support compared to the previous election, falling from 46.8% and 22.6% to 35.7% and 15.5%, and from 33 and 18 seats to 27 and 13, respectively.

The latter had suffered from an internal crisis and the breakup of the People's Coalition in 1986, losing 30% of its 1983 vote and finishing third as a result, with the Regionalist Aragonese Party (PAR) scoring a strong second place with 28.1% and 19 seats.

The centrist Democratic and Social Centre (CDS), a party led by the former Spanish prime minister Adolfo Suarez, saw sizeable gains and achieved a kingmaker position with 10.2% and 6 seats.

As a result, PAR leader Hipólito Gómez de las Roces was elected as new president of Aragon, replacing Santiago Marraco at the helm of a minority administration with AP's support and the CDS's abstention.

The 67 members of the Cortes of Aragon were elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes—which included blank ballots—being applied in each constituency.

[1][2][4] The Cortes of Aragon 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.