John H. Francis Polytechnic High School is a secondary school located in the Sun Valley neighborhood of Los Angeles, California, United States. It serves grades 9 through 12 and is a part of the Los Angeles Unified School District. Despite its name, Polytechnic is a comprehensive high school.

Sun Valley is a neighborhood in Los Angeles, California in the San Fernando Valley region. The neighborhood is known for its overall youthful population and moderate racial diversity. There are three recreation centers in Sun Valley, one of which is a historic site. The neighborhood has thirteen public schools—including John H. Francis Polytechnic High School and Valley Oaks Center for Enriched Studies (VOCES)—and four private schools.