The Santiago microregion () is a microregion in the western part of the state of Rio Grande do Sul, Brazil. Its total area is 11,213.844 km².

Municipalities The microregion consists of the following municipalities:Instituto Brasileiro de Geografia e Estatística, territorial division. Capão do Cipó Itacurubi Jari Júlio de Castilhos Pinhal Grande Quevedos Santiago Tupanciretã Unistalda

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