Rosário do Sul is a Brazilian municipality in the southwestern part of the state of Rio Grande do Sul. The population is 39,314 (2020 est.) in an area of 4,369.65 km2. Its elevation is 151 m. It is located 385 km west of the state capital of Porto Alegre. Its main industry is agriculture. Many Argentine and Uruguayan tourists visits during the spring, with a large infrastructure to accommodate the visitors.