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

[2] 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][3][6] The president had the prerogative to dissolve the Cortes of Aragon and call a snap election, provided that no motion of no confidence was in process and that dissolution did not occur before one year had elapsed since the previous one.

[1] The Cortes of Aragon were officially dissolved on 31 March 2015 after the publication of the dissolution decree in the BOA, setting the election date for 24 May and scheduling for the chamber to reconvene on 18 June.

The table below lists opinion polling on the victory preferences for each party in the event of a regional election taking place.

The table below lists opinion polling on the perceived likelihood of victory for each party in the event of a regional election taking place.