Granite Bay is an unincorporated census-designated place in Placer County. The Granite Bay post office is located at 8757 Auburn-Folsom Road, Granite Bay, CA 95746.
Granite Bay  includes an area of 26 square miles. The boundaries generally are Dick Cook Road to the north, Sierra College Boulevard on the west, Folsom Lake to the east, and the Sacramento County line to the south. The area is located roughly 20 miles northeast of Sacramento. Granite Bay's population is forecast to reach 23,288 by 2035.
Granite Bay is close to employment centers in Roseville, Sacramento, and Folsom. The proximity to I-80 and to adjacent more urban cities makes Granite Bay attractive to commuters. It offers a rural lifestyle characterized by the predominance of large lots in the northern section of the community, limited commercial development, high-quality schools, proximity to Folsom Lake and the prevalence of small agricultural and animal raising uses in the area. Over the past several decades, growth in the Sacramento region, especially employment growth and housing development, has been concentrated in south Placer County. Granite Bay is well located in this context. While housing markets are always cyclical, the attractiveness of Granite Bay is unlikely to change significantly.
Granite Bay contains a mix of suburban and rural-residential parcel sizes. Commercial land use districts in the area are limited. Residential development in Granite Bay covers a spectrum of densities and architectural styles and expressions.
The Folsom Lake State Recreation Area, together with additional lands owned by the County and Eureka School District, are significant open space resources. Also contributing to open space resources are the natural heritage features and areas acquired and/or preserved through the development approvals process.