South Bay
southern part of the San Francisco Bay Area in California
The South Bay is the part of the Bay Area to the south of San Francisco Bay and to the southeast of the San Francisco Peninsula in California. The South Bay is the core of Silicon Valley, where many famous technology companies are located.
- This article is about the region in northern California. For the region in Los Angeles County, see South Bay (Los Angeles County)
There is no precise legal or geographic boundary between the South Bay and the Peninsula β the Peninsula roughly coincides with the borders of San Mateo County, although it also includes the northwestern Santa Clara County cities of Palo Alto, Mountain View, and Los Altos. The rest of Santa Clara County is considered part of the South Bay. Coming south from the East Bay, you enter the South Bay upon entering Milpitas. See Bay Area (California)#Regions for a regional map.