Sunnyvale is a city located in the Santa Clara Valley in northwest Santa Clara County, California.
Sunnyvale lies along the historic El Camino Real and Highway 101 and is bordered by portions of San Jose to the north, Moffett Federal Airfield and NASA Ames Research Center to the northwest, Mountain View to the northwest, Los Altos to the southwest, Cupertino to the south, and Santa Clara to the east.
As of the 2010 United States Census, Sunnyvale's population was 140,095, making it the county's second most populous city and the seventh most populous city in the San Francisco Bay Area.
As one of the major cities comprising California's high-tech area known as Silicon Valley, Sunnyvale is the birthplace of the video game industry, former location of Atari headquarters, and the location of a fictional computer game company in the 1983 film WarGames. Many technology companies are headquartered in Sunnyvale and many more operate there, including several aerospace/defense companies.
Sunnyvale was also the home to Onizuka Air Force Station, often referred to as "the Blue Cube" due to the color and shape of its windowless main building.