Results breakdown of the 1991 Spanish local elections (Asturias)

This is the results breakdown of the local elections held in Asturias on 26 May 1991. The following tables show detailed results in the autonomous community's most populous municipalities, sorted alphabetically.

City control
The following table lists party control in the most populous municipalities, including provincial capitals (shown in bold). Gains for a party are displayed with the cell's background shaded in that party's colour.

Avilés

 * Population: 88,429

Gijón

 * Population: 264,948

Langreo

 * Population: 53,246

Mieres

 * Population: 57,627

Oviedo

 * Population: 194,637

San Martín del Rey Aurelio

 * Population: 24,884

Siero

 * Population: 43,647