Rio das Ostras is a locality located 979.7 km northwest from Brasilia in Rio de Janeiro, Brazil. The population of Rio das Ostras is 155,193 people. Araruama, Cabo Frio, Campos dos Goytacazes are located close to Rio das Ostras. You can find Rio das Ostras on any map using the following decimal coordinates: -22.4541 (latitude), -41.9469 (longitude).