The Asturias Forum (FAC), which had ruled the community in the 2011–12 period, saw a dramatic loss of support, falling to fifth place with 8.2% and 3 seats, overcame by a stagnant United Left (IU/IX) and in a draw with up-and-coming Citizens (C's).

The General Junta of the Principality of Asturias was the devolved, unicameral legislature of the autonomous community of Asturias, having legislative power in regional matters as defined by the Spanish Constitution and the Asturian Statute of Autonomy, as well as the ability to vote confidence in or withdraw it from a regional president.

[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.

[2] 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.

[1][3][6] 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.

[12] Incumbent Socialist Javier Fernández announced his intention to run for re-election to a second term in office, being chosen as his party's candidate without opposition.

[18] Finally, Ignacio Prendes, the only deputy of Union, Progress and Democracy, was expelled from the party and will contest as the candidate of Citizens (C's).

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