Results breakdown of the 1983 Spanish local elections (Basque Country)

This is the results breakdown of the local elections held in the Basque Country on 8 May 1983. 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.

Baracaldo

 * Population: 118,615

Basauri

 * Population: 52,554

Bilbao

 * Population: 433,115

Donostia-San Sebastián

 * Population: 172,303

Getxo

 * Population: 67,793

Irún

 * Population: 53,334

Portugalete

 * Population: 58,071

Rentería

 * Population: 46,496

Santurce Antiguo

 * Population: 53,919

Vitoria-Gasteiz

 * Population: 189,533