Disenchanted voters with the Socialist government that did not see AP as a credible opposition alternative went on to centrist Democratic and Social Centre (CDS), which saw a significant increase of its vote share and entered the General Junta with 8 seats.

United Left (IU), the new incarnation of the Communist Party of Spain and its allies, lost 1 seat despite achieving more votes than in 1983.

[1] Voting for the General Junta was on the basis of universal suffrage, which comprised all nationals over 18 years of age, registered in Asturias and in full enjoyment of their political rights.

The 45 members of the General Junta of the Principality of Asturias were elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes[c]—which included blank ballots—being applied in each constituency.

[2] In smaller constituencies, the use of the electoral method resulted in an effective threshold based on the district magnitude and the distribution of votes among candidacies.

[1][2][4] The General Junta 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.

The highest percentage figure in each polling survey is displayed with its background shaded in the leading party's colour.