Sunnyvale is a city located in Santa Clara County, California. It is part of the Silicon Valley region, known for its technology companies and innovation. The city has a diverse population and offers a mix of residential, commercial, and recreational areas. Founded in the late 1800s, Sunnyvale has grown significantly over the years. It is home to several major tech firms, including Yahoo and Juniper Networks. The city also features parks, shopping centers, and a variety of community events, making it a vibrant place to live and work.