São Bento do Sul is a municipality, pop. 85,421 located in southern Brazil, in the northeast part of the state of Santa Catarina, just south of the s…São Bento do Sul is a municipality, pop. 85,421 located in southern Brazil, in the northeast part of the state of Santa Catarina, just south of the state of Paraná. São Bento do Sul is considered to be an industrialized city.