Located in the globally renowned Santa Clara Valley, Sunnyvale is a prominent city within the San Francisco Bay Area. It is bordered by portions of San Jose to the north, Mountain View to the west, Santa Clara to the east, and Cupertino to the south.
Sunnyvale’s physical geography is defined by its position between the San Francisco Bay and the Santa Cruz Mountains. The city is largely urbanized but maintains significant green spaces, particularly in the northern reaches near the Bay, where marshlands and sloughs offer a glimpse into the region's original coastal ecosystem.