The Santa Clara County Fairgrounds is an event venue in the Spartan Keyes neighborhood of San Jose, California. The Fairgrounds offers 167,000 square feet under roof, 20 acres of lawn and paved outdoor space, plus 40 acres of parking. It is the site of the annual Santa Clara County Fair. The fairgrounds was the location of the now-closed San Jose Speedway. It has been used as a testing and vaccination site for COVID-19.