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is a census-designated place (CDP) in Placer County, California, United States. It is part of the Sacramento–Arden-Arcade–Roseville Metropolitan Statistical Area. The population was 19,388 at the 2000 census. The ZIP code is 95746. Granite Bay is a primarily residential suburb of Sacramento located just east of Roseville and west of Folsom Lake.
thumbGranite Bay is located at (38.748504, -121.179793).
According to the United States Census Bureau, the CDP has a total area of 21.7 square miles (56.1 km²), of which, 21.6 square miles (55.9 km²) of it is land and 0.1 square miles (0.2 km²) of it (0.32%) is water. The place name, Granite Bay, is derived from a bay in Folsom Lake on the east side of the town.
The entire town is underlain by granodiorite of the Penryn Pluton of Cretaceous age, hence the geological basis for the place name.