Results breakdown of the 1999 Spanish local elections (Basque Country)

This is the results breakdown of the local elections held in the Basque Country on 13 June 1999. 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.

Barakaldo

 * Population: 98,649

Basauri

 * Population: 48,107

Bilbao

 * Population: 358,467

Donostia-San Sebastián

 * Population: 178,229

Errenteria

 * Population: 39,376

Getxo

 * Population: 82,974

Irun

 * Population: 55,196

Portugalete

 * Population: 53,498

Santurtzi

 * Population: 48,962

Vitoria-Gasteiz

 * Population: 216,527