São Simão River River in Rondônia, Brazil São Simão RiverLocationCountryBrazilPhysical characteristicsSource • locationRondônia state Mouth • coordinates12°39′S 63°5′W / 12.650°S 63.083°W / -12.650; -63.083 The São Simão River is a river of Rondônia state in western Brazil. See also[edit] List of rivers of Rondônia References[edit] Brazilian Ministry of Transport This article related to a river in Rondônia, Brazil is a stub. You can help Wikipedia by expanding it.vte