Ygnacio Valley High School (YVHS) is a public secondary school located in Concord, California. It draws students from Concord as well as from the neighboring communities of Walnut Creek and Pleasant Hill. The school opened in 1962, and its first senior class graduated in 1964. Originally conceived as a temporary facility, the school currently carries an enrollment of over 1,500 total students for grades 9 through 12. When the nearby Northgate High School opened in 1974, YVHS lost approximately half its student body at the time. The school is part of the Mount Diablo Unified School District.