Santiago do Cacém is a municipality in Setúbal District in Portugal. The population in 2011 was 29,749, in an area of 1059.69 km².

The present mayor is Álvaro Beijinha, elected by the Unitarian Democratic Coalition. The municipal holiday is July 25.

Places of interest

• Harmonia Society
• Park Rio da Figueira
• Miróbriga Ruins
• Castelo de Santiago do Cacém
• Santiago do Cacém Railway Station

Parishes

Administratively, the municipality is divided into eight civil parishes (freguesias):

• Abela
• Alvalade
• Cercal do Alentejo
• Ermidas-Sado
• Santiago do Cacém, Santa Cruz e São Bartolomeu da Serra
• Santo André
• São Domingos e Vale de Água
• São Francisco da Serra