Sunnyvale is a city located in Santa Clara County, California. As of the 2010 United States Census, the population was 140,095.

The city is one of the major cities that make up Silicon Valley. It is the seventh most populous city in the San Francisco Bay Area. Sunnyvale is bordered by portions of San Jose to the north, Moffett Federal Airfield to the northwest, Mountain View to the west, Los Altos to the southwest, Cupertino to the south, and Santa Clara to the east. It lies along the historic El Camino Real and Highway 101.

The southern half of Sunnyvale is predominantly residential, while most of the portion of Sunnyvale north of Highway 237 is zoned for industrial use.

Within this southern half are several neighborhoods that account for a large number of Eichler homes throughout residential Sunnyvale. More specifically, there are 16 housing tracts containing over 1100 Eichler homes. The far eastern section of El Camino Real in Sunnyvale has a significant concentration of businesses owned by South Indian immigrants.

There are many parks in the Sunnyvale Area. These include Las Palmas Park, Ortega Park, Seven Seas Park, Washington Park near downtown, two public golf courses, and Baylands Park, site of the annual Linux Picnic. Full Circle Farm , encompassing 11 acres, is the largest community-based urban farm in Silicon Valley, and is located in the Birdland neighborhood of Sunnyvale. Charles Street Gardens , Sunnyvale's oldest and largest community garden, is located adjacent to Sunnyvale's Public Library.