[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—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 president had the prerogative to dissolve the General Junta and call a snap election, provided that no motion of no confidence was in process, no nationwide election was due and some time requirements were met: namely, that dissolution did not occur either during the first legislative session or within the legislature's last year ahead of its scheduled expiry, nor before one year had elapsed since a previous dissolution under this procedure.

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