John Marshall High School is a free public secondary school in the San Antonio suburb of Leon Valley in northwest Bexar County. The school serves students in grades 9-12. The school is part of the Northside Independent School District, with admission based primarily on the locations of students' homes. The campus serves most of the suburb of Leon Valley and large portions of northwest San Antonio. Marshall was named a National Blue Ribbon School in 1992-93.In 2015, the school district was rated "Met Standard" by the Texas Education Agency.
