博索罗卡（葡萄牙语：Bossoroca）是巴西南大河州的一个市镇。总面积1596.219平方公里，总人口7652人，人口密度4.8人/平方公里。

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Bossoroca is a municipality of the western part of the state of Rio Grande do Sul, Brazil. The population is 6,873 (2015 est.) in an area of 1610.57 km². The name comes from the Guarani language, and may mean erosion. It is located 524 km west of the state capital of Porto Alegre, northeast of Alegrete.