Ilha dos Marinheiros (Portuguese pronunciation: [ˈiʎɐ duz maɾiˈɲejɾus] "Island of the Sailors") is an island located in the south part of a lagoon named Lagoa dos Patos, located in the municipality of Rio Grande, in the state of Rio Grande do Sul, Brazil. It is situated on the west bank of that lagoon. This island has an area 39.28 km² (15.17 sq mi) and is situated 1.5 km (0.93 mi) off the continent at its nearest point.