Governador Island is the largest island in Guanabara Bay, in Rio de Janeiro, Brazil. It has a population of about 211,018 inhabitants, in a small area of 42 km². Rio de Janeiro's main airport, Galeão - Antônio Carlos Jobim International Airport, and the Galeão Air Force Base are located on Governador Island and occupy about a third of it, in the western and …Governador Island is the largest island in Guanabara Bay, in Rio de Janeiro, Brazil. It has a population of about 211,018 inhabitants, in a small area of 42 km². Rio de Janeiro's main airport, Galeão - Antônio Carlos Jobim International Airport, and the Galeão Air Force Base are located on Governador Island and occupy about a third of it, in the western and northwestern parts. A small sea inlet that once existed on the northwestern shore was landfilled to build the airport's runway 10/28, thereby increasing the island's area.