Granite Bay is a census-designated place in Placer County, California, United States. The population was 19,388 at the 2000 census. The ZIP code is 95746. Granite Bay is a primarily residential, upscale suburb of Sacramento located just east of Roseville and west of Folsom Lake. Granite Bay apartments for rent comparison page shows most up to date rent information on Granite Bay apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.