Belvedere is a residential incorporated city located on the San Francisco Bay in Marin County, California, United States. Consisting of two islands and a lagoon, it is connected to the Tiburon Peninsula by two causeways. Belvedere homes for sale provide island living, without the island. Large historic homes perched on hillsides, with commanding views of San Francisco bay define Belvedere, one of the most desired locations in the Bay Area. With waterfront vistas that rival the Cote de Azur (and prices to match) Belvedere is one of Marin’s most exclusive enclaves.