São José das Missões is a municipality in the state of Rio Grande do Sul, in southern Brazil. It is one of the many small municipalities that make up the state's interior, situated within the region historically associated with the Jesuit missions of the Rio Grande do Sul area.
The municipality has a modest population; as of 2020, its estimated population was 2,514. Like other municipalities in Rio Grande do Sul, it functions as a local administrative unit responsible for services and governance within its defined territorial boundaries.