John Marshall Harlan High School is the eleventh public high school in the Northside Independent School District of San Antonio, Texas, United States. A part of the Northside Independent School District (NISD), it opened in 2017. It is named after U.S. Supreme Court justice John Marshall Harlan. It is NISD's 11th comprehensive high school. The 486,000-square-foot (45,200 m2) building, with a cost of $110 million, is NISD's largest school campus. It opened on August 28, 2017.