 San Jacinto High is part of the San Jacinto Unified School District and is located on 17 acres (68,796 m2) on the southeast side of San Jacinto close to the border of Hemet.San Jacinto High, which serves all of San Jacinto, was founded in 1910.San Jacinto Unified School District's first graduating class of three students occurred on June 5, 1891 at a grammar school that Professor Edward Hyatt opened in 1888.