Northgate High School (NHS) is a public high school located in the affluent suburban Northgate neighborhood of Walnut Creek, California. The most recent of five high schools in the Mount Diablo Unified School District, the school was built in 1974, and is home to approximately 1,600 students from Walnut Creek and Concord, California, grades 9-12. Its name derives from its location at the north entrance of Mount Diablo State Park.