Results breakdown of the 2003 Spanish local elections (Castile and León)

This is the results breakdown of the local elections held in Castile and León on 25 May 2003. 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.

Ávila

 * Population: 50,241

Burgos

 * Population: 167,962

León

 * Population: 135,794

Palencia

 * Population: 80,801

Ponferrada

 * Population: 64,010

Salamanca

 * Population: 156,006

Segovia

 * Population: 54,945

Soria

 * Population: 35,112

Valladolid

 * Population: 318,576

Zamora

 * Population: 65,575