The electoral system uses the D'Hondt method and a closed-list proportional representation, with a minimum threshold of three percent.

The Statute provided for the three provinces in Aragon—Huesca, Teruel and Zaragoza—to be established as multi-member districts in the Cortes of Aragon, with this regulation being maintained under the 1987 regional electoral law.

The exception was the 1983 election, when each constituency was allocated a fixed number of seats: 18 for Huesca, 16 for Teruel and 32 for Zaragoza.

[2][3][4] Voting is on the basis of universal suffrage, which comprises all nationals over eighteen, registered in Aragon and in full enjoyment of their political rights.

[5] Seats are elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes—which includes blank ballots—being applied in each constituency.