Santo Antônio do Sudoeste (lit. 'Saint Anthony of the Southwest') is a municipality in the state of Paraná, Brazil with a population of 20,261 inhabitants.^[1] It is on the border between Argentina and Brazil, opposite the Argentine city of San Antonio, Misiones. The San Antonio River separates the two cities.

• List of municipalities in Paraná

26°04′S 53°44′W / 26.067°S 53.733°W / -26.067; -53.733